node_modules

14 files changed, 2861 insertions, 1657 deletions

diff --git a/node_modules/readable-stream/.npmignore b/node_modules/readable-stream/.npmignore
index 38344f87a..265ff739e 100644
--- a/node_modules/readable-stream/.npmignore
+++ b/node_modules/readable-stream/.npmignore
@@ -2,4 +2,7 @@ build/
 test/
 examples/
 fs.js
-zlib.js
\ No newline at end of file
+zlib.js
+.zuul.yml
+.nyc_output
+coverage
diff --git a/node_modules/readable-stream/.travis.yml b/node_modules/readable-stream/.travis.yml
new file mode 100644
index 000000000..84504c98f
--- /dev/null
+++ b/node_modules/readable-stream/.travis.yml
@@ -0,0 +1,49 @@
+sudo: false
+language: node_js
+before_install:
+  - npm install -g npm@2
+  - npm install -g npm
+notifications:
+  email: false
+matrix:
+  fast_finish: true
+  include:
+  - node_js: '0.8'
+    env: TASK=test
+  - node_js: '0.10'
+    env: TASK=test
+  - node_js: '0.11'
+    env: TASK=test
+  - node_js: '0.12'
+    env: TASK=test
+  - node_js: 1
+    env: TASK=test
+  - node_js: 2
+    env: TASK=test
+  - node_js: 3
+    env: TASK=test
+  - node_js: 4
+    env: TASK=test
+  - node_js: 5
+    env: TASK=test
+  - node_js: 6
+    env: TASK=test
+  - node_js: 5
+    env: TASK=browser BROWSER_NAME=android BROWSER_VERSION="4.0..latest"
+  - node_js: 5
+    env: TASK=browser BROWSER_NAME=ie BROWSER_VERSION="9..latest"
+  - node_js: 5
+    env: TASK=browser BROWSER_NAME=opera BROWSER_VERSION="11..latest"
+  - node_js: 5
+    env: TASK=browser BROWSER_NAME=chrome BROWSER_VERSION="-3..latest"
+  - node_js: 5
+    env: TASK=browser BROWSER_NAME=firefox BROWSER_VERSION="-3..latest"
+  - node_js: 5
+    env: TASK=browser BROWSER_NAME=safari BROWSER_VERSION="5..latest"
+  - node_js: 5
+    env: TASK=browser BROWSER_NAME=microsoftedge BROWSER_VERSION=latest
+script: "npm run $TASK"
+env:
+  global:
+  - secure: rE2Vvo7vnjabYNULNyLFxOyt98BoJexDqsiOnfiD6kLYYsiQGfr/sbZkPMOFm9qfQG7pjqx+zZWZjGSswhTt+626C0t/njXqug7Yps4c3dFblzGfreQHp7wNX5TFsvrxd6dAowVasMp61sJcRnB2w8cUzoe3RAYUDHyiHktwqMc=
+  - secure: g9YINaKAdMatsJ28G9jCGbSaguXCyxSTy+pBO6Ch0Cf57ZLOTka3HqDj8p3nV28LUIHZ3ut5WO43CeYKwt4AUtLpBS3a0dndHdY6D83uY6b2qh5hXlrcbeQTq2cvw2y95F7hm4D1kwrgZ7ViqaKggRcEupAL69YbJnxeUDKWEdI=
diff --git a/node_modules/readable-stream/README.md b/node_modules/readable-stream/README.md
index e46b82390..9fb4feaaa 100644
--- a/node_modules/readable-stream/README.md
+++ b/node_modules/readable-stream/README.md
@@ -1,15 +1,36 @@
 # readable-stream
 
-***Node-core streams for userland***
+***Node-core v6.3.1 streams for userland*** [![Build Status](https://travis-ci.org/nodejs/readable-stream.svg?branch=master)](https://travis-ci.org/nodejs/readable-stream)
+
 
 [![NPM](https://nodei.co/npm/readable-stream.png?downloads=true&downloadRank=true)](https://nodei.co/npm/readable-stream/)
-[![NPM](https://nodei.co/npm-dl/readable-stream.png&months=6&height=3)](https://nodei.co/npm/readable-stream/)
+[![NPM](https://nodei.co/npm-dl/readable-stream.png?&months=6&height=3)](https://nodei.co/npm/readable-stream/)
+
+
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/readable-stream.svg)](https://saucelabs.com/u/readable-stream)
+
+```bash
+npm install --save readable-stream
+```
+
+***Node-core streams for userland***
 
-This package is a mirror of the Streams2 and Streams3 implementations in Node-core.
+This package is a mirror of the Streams2 and Streams3 implementations in
+Node-core, including [documentation](doc/stream.md).
 
-If you want to guarantee a stable streams base, regardless of what version of Node you, or the users of your libraries are using, use **readable-stream** *only* and avoid the *"stream"* module in Node-core.
+If you want to guarantee a stable streams base, regardless of what version of
+Node you, or the users of your libraries are using, use **readable-stream** *only* and avoid the *"stream"* module in Node-core, for background see [this blogpost](http://r.va.gg/2014/06/why-i-dont-use-nodes-core-stream-module.html).
 
-**readable-stream** comes in two major versions, v1.0.x and v1.1.x. The former tracks the Streams2 implementation in Node 0.10, including bug-fixes and minor improvements as they are added. The latter tracks Streams3 as it develops in Node 0.11; we will likely see a v1.2.x branch for Node 0.12.
+As of version 2.0.0 **readable-stream** uses semantic versioning.  
 
-**readable-stream** uses proper patch-level versioning so if you pin to `"~1.0.0"` you’ll get the latest Node 0.10 Streams2 implementation, including any fixes and minor non-breaking improvements. The patch-level versions of 1.0.x and 1.1.x should mirror the patch-level versions of Node-core releases. You should prefer the **1.0.x** releases for now and when you’re ready to start using Streams3, pin to `"~1.1.0"`
+# Streams WG Team Members
 
+* **Chris Dickinson** ([@chrisdickinson](https://github.com/chrisdickinson)) <christopher.s.dickinson@gmail.com>
+  - Release GPG key: 9554F04D7259F04124DE6B476D5A82AC7E37093B
+* **Calvin Metcalf** ([@calvinmetcalf](https://github.com/calvinmetcalf)) <calvin.metcalf@gmail.com>
+  - Release GPG key: F3EF5F62A87FC27A22E643F714CE4FF5015AA242
+* **Rod Vagg** ([@rvagg](https://github.com/rvagg)) <rod@vagg.org>
+  - Release GPG key: DD8F2338BAE7501E3DD5AC78C273792F7D83545D
+* **Sam Newman** ([@sonewman](https://github.com/sonewman)) <newmansam@outlook.com>
+* **Mathias Buus** ([@mafintosh](https://github.com/mafintosh)) <mathiasbuus@gmail.com>
+* **Domenic Denicola** ([@domenic](https://github.com/domenic)) <d@domenic.me>
diff --git a/node_modules/readable-stream/doc/stream.md b/node_modules/readable-stream/doc/stream.md
new file mode 100644
index 000000000..fc269c8e3
--- /dev/null
+++ b/node_modules/readable-stream/doc/stream.md
@@ -0,0 +1,2015 @@
+# Stream
+
+    Stability: 2 - Stable
+
+A stream is an abstract interface for working with streaming data in Node.js.
+The `stream` module provides a base API that makes it easy to build objects
+that implement the stream interface.
+
+There are many stream objects provided by Node.js. For instance, a
+[request to an HTTP server][http-incoming-message] and [`process.stdout`][]
+are both stream instances.
+
+Streams can be readable, writable, or both. All streams are instances of
+[`EventEmitter`][].
+
+The `stream` module can be accessed using:
+
+```js
+const stream = require('stream');
+```
+
+While it is important for all Node.js users to understand how streams works,
+the `stream` module itself is most useful for developer's that are creating new
+types of stream instances. Developer's who are primarily *consuming* stream
+objects will rarely (if ever) have need to use the `stream` module directly.
+
+## Organization of this document
+
+This document is divided into two primary sections and third section for
+additional notes. The first section explains the elements of the stream API that
+are required to *use* streams within an application. The second section explains
+the elements of the API that are required to *implement* new types of streams.
+
+## Types of Streams
+
+There are four fundamental stream types within Node.js:
+
+* [Readable][] - streams from which data can be read (for example
+  [`fs.createReadStream()`][]).
+* [Writable][] - streams to which data can be written (for example
+  [`fs.createWriteStream()`][]).
+* [Duplex][] - streams that are both Readable and Writable (for example
+  [`net.Socket`][]).
+* [Transform][] - Duplex streams that can modify or transform the data as it
+  is written and read (for example [`zlib.createDeflate()`][]).
+
+### Object Mode
+
+All streams created by Node.js APIs operate exclusively on strings and `Buffer`
+objects. It is possible, however, for stream implementations to work with other
+types of JavaScript values (with the exception of `null` which serves a special
+purpose within streams). Such streams are considered to operate in "object
+mode".
+
+Stream instances are switched into object mode using the `objectMode` option
+when the stream is created. Attempting to switch an existing stream into
+object mode is not safe.
+
+### Buffering
+
+<!--type=misc-->
+
+Both [Writable][] and [Readable][] streams will store data in an internal
+buffer that can be retrieved using `writable._writableState.getBuffer()` or
+`readable._readableState.buffer`, respectively.
+
+The amount of data potentially buffered depends on the `highWaterMark` option
+passed into the streams constructor. For normal streams, the `highWaterMark`
+option specifies a total number of bytes. For streams operating in object mode,
+the `highWaterMark` specifies a total number of objects.
+
+Data is buffered in Readable streams when the implementation calls
+[`stream.push(chunk)`][stream-push]. If the consumer of the Stream does not
+call [`stream.read()`][stream-read], the data will sit in the internal
+queue until it is consumed.
+
+Once the total size of the internal read buffer reaches the threshold specified
+by `highWaterMark`, the stream will temporarily stop reading data from the
+underlying resource until the data currently buffered can be consumed (that is,
+the stream will stop calling the internal `readable._read()` method that is
+used to fill the read buffer).
+
+Data is buffered in Writable streams when the
+[`writable.write(chunk)`][stream-write] method is called repeatedly. While the
+total size of the internal write buffer is below the threshold set by
+`highWaterMark`, calls to `writable.write()` will return `true`. Once the
+the size of the internal buffer reaches or exceeds the `highWaterMark`, `false`
+will be returned.
+
+A key goal of the `stream` API, and in particular the [`stream.pipe()`] method,
+is to limit the buffering of data to acceptable levels such that sources and
+destinations of differing speeds will not overwhelm the available memory.
+
+Because [Duplex][] and [Transform][] streams are both Readable and Writable,
+each maintain *two* separate internal buffers used for reading and writing,
+allowing each side to operate independently of the other while maintaining an
+appropriate and efficient flow of data. For example, [`net.Socket`][] instances
+are [Duplex][] streams whose Readable side allows consumption of data received
+*from* the socket and whose Writable side allows writing data *to* the socket.
+Because data may be written to the socket at a faster or slower rate than data
+is received, it is important each side operate (and buffer) independently of
+the other.
+
+## API for Stream Consumers
+
+<!--type=misc-->
+
+Almost all Node.js applications, no matter how simple, use streams in some
+manner. The following is an example of using streams in a Node.js application
+that implements an HTTP server:
+
+```js
+const http = require('http');
+
+const server = http.createServer( (req, res) => {
+  // req is an http.IncomingMessage, which is a Readable Stream
+  // res is an http.ServerResponse, which is a Writable Stream
+
+  let body = '';
+  // Get the data as utf8 strings.
+  // If an encoding is not set, Buffer objects will be received.
+  req.setEncoding('utf8');
+
+  // Readable streams emit 'data' events once a listener is added
+  req.on('data', (chunk) => {
+    body += chunk;
+  });
+
+  // the end event indicates that the entire body has been received
+  req.on('end', () => {
+    try {
+      const data = JSON.parse(body);
+    } catch (er) {
+      // uh oh!  bad json!
+      res.statusCode = 400;
+      return res.end(`error: ${er.message}`);
+    }
+
+    // write back something interesting to the user:
+    res.write(typeof data);
+    res.end();
+  });
+});
+
+server.listen(1337);
+
+// $ curl localhost:1337 -d '{}'
+// object
+// $ curl localhost:1337 -d '"foo"'
+// string
+// $ curl localhost:1337 -d 'not json'
+// error: Unexpected token o
+```
+
+[Writable][] streams (such as `res` in the example) expose methods such as
+`write()` and `end()` that are used to write data onto the stream.
+
+[Readable][] streams use the [`EventEmitter`][] API for notifying application
+code when data is available to be read off the stream. That available data can
+be read from the stream in multiple ways.
+
+Both [Writable][] and [Readable][] streams use the [`EventEmitter`][] API in
+various ways to communicate the current state of the stream.
+
+[Duplex][] and [Transform][] streams are both [Writable][] and [Readable][].
+
+Applications that are either writing data to or consuming data from a stream
+are not required to implement the stream interfaces directly and will generally
+have no reason to call `require('stream')`.
+
+Developers wishing to implement new types of streams should refer to the
+section [API for Stream Implementers][].
+
+### Writable Streams
+
+Writable streams are an abstraction for a *destination* to which data is
+written.
+
+Examples of [Writable][] streams include:
+
+* [HTTP requests, on the client][]
+* [HTTP responses, on the server][]
+* [fs write streams][]
+* [zlib streams][zlib]
+* [crypto streams][crypto]
+* [TCP sockets][]
+* [child process stdin][]
+* [`process.stdout`][], [`process.stderr`][]
+
+*Note*: Some of these examples are actually [Duplex][] streams that implement
+the [Writable][] interface.
+
+All [Writable][] streams implement the interface defined by the
+`stream.Writable` class.
+
+While specific instances of [Writable][] streams may differ in various ways,
+all Writable streams follow the same fundamental usage pattern as illustrated
+in the example below:
+
+```js
+const myStream = getWritableStreamSomehow();
+myStream.write('some data');
+myStream.write('some more data');
+myStream.end('done writing data');
+```
+
+#### Class: stream.Writable
+<!-- YAML
+added: v0.9.4
+-->
+
+<!--type=class-->
+
+##### Event: 'close'
+<!-- YAML
+added: v0.9.4
+-->
+
+The `'close'` event is emitted when the stream and any of its underlying
+resources (a file descriptor, for example) have been closed. The event indicates
+that no more events will be emitted, and no further computation will occur.
+
+Not all Writable streams will emit the `'close'` event.
+
+##### Event: 'drain'
+<!-- YAML
+added: v0.9.4
+-->
+
+If a call to [`stream.write(chunk)`][stream-write] returns `false`, the
+`'drain'` event will be emitted when it is appropriate to resume writing data
+to the stream.
+
+```js
+// Write the data to the supplied writable stream one million times.
+// Be attentive to back-pressure.
+function writeOneMillionTimes(writer, data, encoding, callback) {
+  let i = 1000000;
+  write();
+  function write() {
+    var ok = true;
+    do {
+      i--;
+      if (i === 0) {
+        // last time!
+        writer.write(data, encoding, callback);
+      } else {
+        // see if we should continue, or wait
+        // don't pass the callback, because we're not done yet.
+        ok = writer.write(data, encoding);
+      }
+    } while (i > 0 && ok);
+    if (i > 0) {
+      // had to stop early!
+      // write some more once it drains
+      writer.once('drain', write);
+    }
+  }
+}
+```
+
+##### Event: 'error'
+<!-- YAML
+added: v0.9.4
+-->
+
+* {Error}
+
+The `'error'` event is emitted if an error occurred while writing or piping
+data. The listener callback is passed a single `Error` argument when called.
+
+*Note*: The stream is not closed when the `'error'` event is emitted.
+
+##### Event: 'finish'
+<!-- YAML
+added: v0.9.4
+-->
+
+The `'finish'` event is emitted after the [`stream.end()`][stream-end] method
+has been called, and all data has been flushed to the underlying system.
+
+```js
+const writer = getWritableStreamSomehow();
+for (var i = 0; i < 100; i ++) {
+  writer.write('hello, #${i}!\n');
+}
+writer.end('This is the end\n');
+writer.on('finish', () => {
+  console.error('All writes are now complete.');
+});
+```
+
+##### Event: 'pipe'
+<!-- YAML
+added: v0.9.4
+-->
+
+* `src` {stream.Readable} source stream that is piping to this writable
+
+The `'pipe'` event is emitted when the [`stream.pipe()`][] method is called on
+a readable stream, adding this writable to its set of destinations.
+
+```js
+const writer = getWritableStreamSomehow();
+const reader = getReadableStreamSomehow();
+writer.on('pipe', (src) => {
+  console.error('something is piping into the writer');
+  assert.equal(src, reader);
+});
+reader.pipe(writer);
+```
+
+##### Event: 'unpipe'
+<!-- YAML
+added: v0.9.4
+-->
+
+* `src` {[Readable][] Stream} The source stream that
+  [unpiped][`stream.unpipe()`] this writable
+
+The `'unpipe'` event is emitted when the [`stream.unpipe()`][] method is called
+on a [Readable][] stream, removing this [Writable][] from its set of
+destinations.
+
+```js
+const writer = getWritableStreamSomehow();
+const reader = getReadableStreamSomehow();
+writer.on('unpipe', (src) => {
+  console.error('Something has stopped piping into the writer.');
+  assert.equal(src, reader);
+});
+reader.pipe(writer);
+reader.unpipe(writer);
+```
+
+##### writable.cork()
+<!-- YAML
+added: v0.11.2
+-->
+
+The `writable.cork()` method forces all written data to be buffered in memory.
+The buffered data will be flushed when either the [`stream.uncork()`][] or
+[`stream.end()`][stream-end] methods are called.
+
+The primary intent of `writable.cork()` is to avoid a situation where writing
+many small chunks of data to a stream do not cause an backup in the internal
+buffer that would have an adverse impact on performance. In such situations,
+implementations that implement the `writable._writev()` method can perform
+buffered writes in a more optimized manner.
+
+##### writable.end([chunk][, encoding][, callback])
+<!-- YAML
+added: v0.9.4
+-->
+
+* `chunk` {String|Buffer|any} Optional data to write. For streams not operating
+  in object mode, `chunk` must be a string or a `Buffer`. For object mode
+  streams, `chunk` may be any JavaScript value other than `null`.
+* `encoding` {String} The encoding, if `chunk` is a String
+* `callback` {Function} Optional callback for when the stream is finished
+
+Calling the `writable.end()` method signals that no more data will be written
+to the [Writable][]. The optional `chunk` and `encoding` arguments allow one
+final additional chunk of data to be written immediately before closing the
+stream. If provided, the optional `callback` function is attached as a listener
+for the [`'finish'`][] event.
+
+Calling the [`stream.write()`][stream-write] method after calling
+[`stream.end()`][stream-end] will raise an error.
+
+```js
+// write 'hello, ' and then end with 'world!'
+const file = fs.createWriteStream('example.txt');
+file.write('hello, ');
+file.end('world!');
+// writing more now is not allowed!
+```
+
+##### writable.setDefaultEncoding(encoding)
+<!-- YAML
+added: v0.11.15
+-->
+
+* `encoding` {String} The new default encoding
+* Return: `this`
+
+The `writable.setDefaultEncoding()` method sets the default `encoding` for a
+[Writable][] stream.
+
+##### writable.uncork()
+<!-- YAML
+added: v0.11.2
+-->
+
+The `writable.uncork()` method flushes all data buffered since
+[`stream.cork()`][] was called.
+
+When using `writable.cork()` and `writable.uncork()` to manage the buffering
+of writes to a stream, it is recommended that calls to `writable.uncork()` be
+deferred using `process.nextTick()`. Doing so allows batching of all
+`writable.write()` calls that occur within a given Node.js event loop phase.
+
+```js
+stream.cork();
+stream.write('some ');
+stream.write('data ');
+process.nextTick(() => stream.uncork());
+```
+
+If the `writable.cork()` method is called multiple times on a stream, the same
+number of calls to `writable.uncork()` must be called to flush the buffered
+data.
+
+```
+stream.cork();
+stream.write('some ');
+stream.cork();
+stream.write('data ');
+process.nextTick(() => {
+  stream.uncork();
+  // The data will not be flushed until uncork() is called a second time.
+  stream.uncork();
+});
+```
+
+##### writable.write(chunk[, encoding][, callback])
+<!-- YAML
+added: v0.9.4
+-->
+
+* `chunk` {String|Buffer} The data to write
+* `encoding` {String} The encoding, if `chunk` is a String
+* `callback` {Function} Callback for when this chunk of data is flushed
+* Returns: {Boolean} `false` if the stream wishes for the calling code to
+  wait for the `'drain'` event to be emitted before continuing to write
+  additional data; otherwise `true`.
+
+The `writable.write()` method writes some data to the stream, and calls the
+supplied `callback` once the data has been fully handled. If an error
+occurs, the `callback` *may or may not* be called with the error as its
+first argument. To reliably detect write errors, add a listener for the
+`'error'` event.
+
+The return value indicates whether the written `chunk` was buffered internally
+and the buffer has exceeded the `highWaterMark` configured when the stream was
+created. If `false` is returned, further attempts to write data to the stream
+should be paused until the `'drain'` event is emitted.
+
+A Writable stream in object mode will always ignore the `encoding` argument.
+
+### Readable Streams
+
+Readable streams are an abstraction for a *source* from which data is
+consumed.
+
+Examples of Readable streams include:
+
+* [HTTP responses, on the client][http-incoming-message]
+* [HTTP requests, on the server][http-incoming-message]
+* [fs read streams][]
+* [zlib streams][zlib]
+* [crypto streams][crypto]
+* [TCP sockets][]
+* [child process stdout and stderr][]
+* [`process.stdin`][]
+
+All [Readable][] streams implement the interface defined by the
+`stream.Readable` class.
+
+#### Two Modes
+
+Readable streams effectively operate in one of two modes: flowing and paused.
+
+When in flowing mode, data is read from the underlying system automatically
+and provided to an application as quickly as possible using events via the
+[`EventEmitter`][] interface.
+
+In paused mode, the [`stream.read()`][stream-read] method must be called
+explicitly to read chunks of data from the stream.
+
+All [Readable][] streams begin in paused mode but can be switched to flowing
+mode in one of the following ways:
+
+* Adding a [`'data'`][] event handler.
+* Calling the [`stream.resume()`][stream-resume] method.
+* Calling the [`stream.pipe()`][] method to send the data to a [Writable][].
+
+The Readable can switch back to paused mode using one of the following:
+
+* If there are no pipe destinations, by calling the
+  [`stream.pause()`][stream-pause] method.
+* If there are pipe destinations, by removing any [`'data'`][] event
+  handlers, and removing all pipe destinations by calling the
+  [`stream.unpipe()`][] method.
+
+The important concept to remember is that a Readable will not generate data
+until a mechanism for either consuming or ignoring that data is provided. If
+the consuming mechanism is disabled or taken away, the Readable will *attempt*
+to stop generating the data.
+
+*Note*: For backwards compatibility reasons, removing [`'data'`][] event
+handlers will **not** automatically pause the stream. Also, if there are piped
+destinations, then calling [`stream.pause()`][stream-pause] will not guarantee
+that the stream will *remain* paused once those destinations drain and ask for
+more data.
+
+*Note*: If a [Readable][] is switched into flowing mode and there are no
+consumers available handle the data, that data will be lost. This can occur,
+for instance, when the `readable.resume()` method is called without a listener
+attached to the `'data'` event, or when a `'data'` event handler is removed
+from the stream.
+
+#### Three States
+
+The "two modes" of operation for a Readable stream are a simplified abstraction
+for the more complicated internal state management that is happening within the
+Readable stream implementation.
+
+Specifically, at any given point in time, every Readable is in one of three
+possible states:
+
+* `readable._readableState.flowing = null`
+* `readable._readableState.flowing = false`
+* `readable._readableState.flowing = true`
+
+When `readable._readableState.flowing` is `null`, no mechanism for consuming the
+streams data is provided so the stream will not generate its data.
+
+Attaching a listener for the `'data'` event, calling the `readable.pipe()`
+method, or calling the `readable.resume()` method will switch
+`readable._readableState.flowing` to `true`, causing the Readable to begin
+actively emitting events as data is generated.
+
+Calling `readable.pause()`, `readable.unpipe()`, or receiving "back pressure"
+will cause the `readable._readableState.flowing` to be set as `false`,
+temporarily halting the flowing of events but *not* halting the generation of
+data.
+
+While `readable._readableState.flowing` is `false`, data may be accumulating
+within the streams internal buffer.
+
+#### Choose One
+
+The Readable stream API evolved across multiple Node.js versions and provides
+multiple methods of consuming stream data. In general, developers should choose
+*one* of the methods of consuming data and *should never* use multiple methods
+to consume data from a single stream.
+
+Use of the `readable.pipe()` method is recommended for most users as it has been
+implemented to provide the easiest way of consuming stream data. Developers that
+require more fine-grained control over the transfer and generation of data can
+use the [`EventEmitter`][] and `readable.pause()`/`readable.resume()` APIs.
+
+#### Class: stream.Readable
+<!-- YAML
+added: v0.9.4
+-->
+
+<!--type=class-->
+
+##### Event: 'close'
+<!-- YAML
+added: v0.9.4
+-->
+
+The `'close'` event is emitted when the stream and any of its underlying
+resources (a file descriptor, for example) have been closed. The event indicates
+that no more events will be emitted, and no further computation will occur.
+
+Not all [Readable][] streams will emit the `'close'` event.
+
+##### Event: 'data'
+<!-- YAML
+added: v0.9.4
+-->
+
+* `chunk` {Buffer|String|any} The chunk of data. For streams that are not
+  operating in object mode, the chunk will be either a string or `Buffer`.
+  For streams that are in object mode, the chunk can be any JavaScript value
+  other than `null`.
+
+The `'data'` event is emitted whenever the stream is relinquishing ownership of
+a chunk of data to a consumer. This may occur whenever the stream is switched
+in flowing mode by calling `readable.pipe()`, `readable.resume()`, or by
+attaching a listener callback to the `'data'` event. The `'data'` event will
+also be emitted whenever the `readable.read()` method is called and a chunk of
+data is available to be returned.
+
+Attaching a `'data'` event listener to a stream that has not been explicitly
+paused will switch the stream into flowing mode. Data will then be passed as
+soon as it is available.
+
+The listener callback will be passed the chunk of data as a string if a default
+encoding has been specified for the stream using the
+`readable.setEncoding()` method; otherwise the data will be passed as a
+`Buffer`.
+
+```js
+const readable = getReadableStreamSomehow();
+readable.on('data', (chunk) => {
+  console.log(`Received ${chunk.length} bytes of data.`);
+});
+```
+
+##### Event: 'end'
+<!-- YAML
+added: v0.9.4
+-->
+
+The `'end'` event is emitted when there is no more data to be consumed from
+the stream.
+
+*Note*: The `'end'` event **will not be emitted** unless the data is
+completely consumed. This can be accomplished by switching the stream into
+flowing mode, or by calling [`stream.read()`][stream-read] repeatedly until
+all data has been consumed.
+
+```js
+const readable = getReadableStreamSomehow();
+readable.on('data', (chunk) => {
+  console.log(`Received ${chunk.length} bytes of data.`);
+});
+readable.on('end', () => {
+  console.log('There will be no more data.');
+});
+```
+
+##### Event: 'error'
+<!-- YAML
+added: v0.9.4
+-->
+
+* {Error}
+
+The `'error'` event may be emitted by a Readable implementation at any time.
+Typically, this may occur if the underlying stream in unable to generate data
+due to an underlying internal failure, or when a stream implementation attempts
+to push an invalid chunk of data.
+
+The listener callback will be passed a single `Error` object.
+
+##### Event: 'readable'
+<!-- YAML
+added: v0.9.4
+-->
+
+The `'readable'` event is emitted when there is data available to be read from
+the stream. In some cases, attaching a listener for the `'readable'` event will
+cause some amount of data to be read into an internal buffer.
+
+```javascript
+const readable = getReadableStreamSomehow();
+readable.on('readable', () => {
+  // there is some data to read now
+});
+```
+The `'readable'` event will also be emitted once the end of the stream data
+has been reached but before the `'end'` event is emitted.
+
+Effectively, the `'readable'` event indicates that the stream has new
+information: either new data is available or the end of the stream has been
+reached. In the former case, [`stream.read()`][stream-read] will return the
+available data. In the latter case, [`stream.read()`][stream-read] will return
+`null`. For instance, in the following example, `foo.txt` is an empty file:
+
+```js
+const fs = require('fs');
+const rr = fs.createReadStream('foo.txt');
+rr.on('readable', () => {
+  console.log('readable:', rr.read());
+});
+rr.on('end', () => {
+  console.log('end');
+});
+```
+
+The output of running this script is:
+
+```
+$ node test.js
+readable: null
+end
+```
+
+*Note*: In general, the `readable.pipe()` and `'data'` event mechanisms are
+preferred over the use of the `'readable'` event.
+
+##### readable.isPaused()
+<!--
+added: v0.11.14
+-->
+
+* Return: {Boolean}
+
+The `readable.isPaused()` method returns the current operating state of the
+Readable. This is used primarily by the mechanism that underlies the
+`readable.pipe()` method. In most typical cases, there will be no reason to
+use this method directly.
+
+```js
+const readable = new stream.Readable
+
+readable.isPaused() // === false
+readable.pause()
+readable.isPaused() // === true
+readable.resume()
+readable.isPaused() // === false
+```
+
+##### readable.pause()
+<!-- YAML
+added: v0.9.4
+-->
+
+* Return: `this`
+
+The `readable.pause()` method will cause a stream in flowing mode to stop
+emitting [`'data'`][] events, switching out of flowing mode. Any data that
+becomes available will remain in the internal buffer.
+
+```js
+const readable = getReadableStreamSomehow();
+readable.on('data', (chunk) => {
+  console.log(`Received ${chunk.length} bytes of data.`);
+  readable.pause();
+  console.log('There will be no additional data for 1 second.');
+  setTimeout(() => {
+    console.log('Now data will start flowing again.');
+    readable.resume();
+  }, 1000);
+});
+```
+
+##### readable.pipe(destination[, options])
+<!-- YAML
+added: v0.9.4
+-->
+
+* `destination` {stream.Writable} The destination for writing data
+* `options` {Object} Pipe options
+  * `end` {Boolean} End the writer when the reader ends. Defaults to `true`.
+
+The `readable.pipe()` method attaches a [Writable][] stream to the `readable`,
+causing it to switch automatically into flowing mode and push all of its data
+to the attached [Writable][]. The flow of data will be automatically managed so
+that the destination Writable stream is not overwhelmed by a faster Readable
+stream.
+
+The following example pipes all of the data from the `readable` into a file
+named `file.txt`:
+
+```js
+const readable = getReadableStreamSomehow();
+const writable = fs.createWriteStream('file.txt');
+// All the data from readable goes into 'file.txt'
+readable.pipe(writable);
+```
+It is possible to attach multiple Writable streams to a single Readable stream.
+
+The `readable.pipe()` method returns a reference to the *destination* stream
+making it possible to set up chains of piped streams:
+
+```js
+const r = fs.createReadStream('file.txt');
+const z = zlib.createGzip();
+const w = fs.createWriteStream('file.txt.gz');
+r.pipe(z).pipe(w);
+```
+
+By default, [`stream.end()`][stream-end] is called on the destination Writable
+stream when the source Readable stream emits [`'end'`][], so that the
+destination is no longer writable. To disable this default behavior, the `end`
+option can be passed as `false`, causing the destination stream to remain open,
+as illustrated in the following example:
+
+```js
+reader.pipe(writer, { end: false });
+reader.on('end', () => {
+  writer.end('Goodbye\n');
+});
+```
+
+One important caveat is that if the Readable stream emits an error during
+processing, the Writable destination *is not closed* automatically. If an
+error occurs, it will be necessary to *manually* close each stream in order
+to prevent memory leaks.
+
+*Note*: The [`process.stderr`][] and [`process.stdout`][] Writable streams are
+never closed until the Node.js process exits, regardless of the specified
+options.
+
+##### readable.read([size])
+<!-- YAML
+added: v0.9.4
+-->
+
+* `size` {Number} Optional argument to specify how much data to read.
+* Return {String|Buffer|Null}
+
+The `readable.read()` method pulls some data out of the internal buffer and
+returns it. If no data available to be read, `null` is returned. By default,
+the data will be returned as a `Buffer` object unless an encoding has been
+specified using the `readable.setEncoding()` method or the stream is operating
+in object mode.
+
+The optional `size` argument specifies a specific number of bytes to read. If
+`size` bytes are not available to be read, `null` will be returned *unless*
+the stream has ended, in which case all of the data remaining in the internal
+buffer will be returned (*even if it exceeds `size` bytes*).
+
+If the `size` argument is not specified, all of the data contained in the
+internal buffer will be returned.
+
+The `readable.read()` method should only be called on Readable streams operating
+in paused mode. In flowing mode, `readable.read()` is called automatically until
+the internal buffer is fully drained.
+
+```js
+const readable = getReadableStreamSomehow();
+readable.on('readable', () => {
+  var chunk;
+  while (null !== (chunk = readable.read())) {
+    console.log(`Received ${chunk.length} bytes of data.`);
+  }
+});
+```
+
+In general, it is recommended that developers avoid the use of the `'readable'`
+event and the `readable.read()` method in favor of using either
+`readable.pipe()` or the `'data'` event.
+
+A Readable stream in object mode will always return a single item from
+a call to [`readable.read(size)`][stream-read], regardless of the value of the
+`size` argument.
+
+*Note:* If the `readable.read()` method returns a chunk of data, a `'data'`
+event will also be emitted.
+
+*Note*: Calling [`stream.read([size])`][stream-read] after the [`'end'`][]
+event has been emitted will return `null`. No runtime error will be raised.
+
+##### readable.resume()
+<!-- YAML
+added: v0.9.4
+-->
+
+* Return: `this`
+
+The `readable.resume()` method causes an explicitly paused Readable stream to
+resume emitting [`'data'`][] events, switching the stream into flowing mode.
+
+The `readable.resume()` method can be used to fully consume the data from a
+stream without actually processing any of that data as illustrated in the
+following example:
+
+```js
+getReadableStreamSomehow()
+  .resume()
+  .on('end', () => {
+    console.log('Reached the end, but did not read anything.');
+  });
+```
+
+##### readable.setEncoding(encoding)
+<!-- YAML
+added: v0.9.4
+-->
+
+* `encoding` {String} The encoding to use.
+* Return: `this`
+
+The `readable.setEncoding()` method sets the default character encoding for
+data read from the Readable stream.
+
+Setting an encoding causes the stream data
+to be returned as string of the specified encoding rather than as `Buffer`
+objects. For instance, calling `readable.setEncoding('utf8')` will cause the
+output data will be interpreted as UTF-8 data, and passed as strings. Calling
+`readable.setEncoding('hex')` will cause the data to be encoded in hexadecimal
+string format.
+
+The Readable stream will properly handle multi-byte characters delivered through
+the stream that would otherwise become improperly decoded if simply pulled from
+the stream as `Buffer` objects.
+
+Encoding can be disabled by calling `readable.setEncoding(null)`. This approach
+is useful when working with binary data or with large multi-byte strings spread
+out over multiple chunks.
+
+```js
+const readable = getReadableStreamSomehow();
+readable.setEncoding('utf8');
+readable.on('data', (chunk) => {
+  assert.equal(typeof chunk, 'string');
+  console.log('got %d characters of string data', chunk.length);
+});
+```
+
+##### readable.unpipe([destination])
+<!-- YAML
+added: v0.9.4
+-->
+
+* `destination` {stream.Writable} Optional specific stream to unpipe
+
+The `readable.unpipe()` method detaches a Writable stream previously attached
+using the [`stream.pipe()`][] method.
+
+If the `destination` is not specified, then *all* pipes are detached.
+
+If the `destination` is specified, but no pipe is set up for it, then
+the method does nothing.
+
+```js
+const readable = getReadableStreamSomehow();
+const writable = fs.createWriteStream('file.txt');
+// All the data from readable goes into 'file.txt',
+// but only for the first second
+readable.pipe(writable);
+setTimeout(() => {
+  console.log('Stop writing to file.txt');
+  readable.unpipe(writable);
+  console.log('Manually close the file stream');
+  writable.end();
+}, 1000);
+```
+
+##### readable.unshift(chunk)
+<!-- YAML
+added: v0.9.11
+-->
+
+* `chunk` {Buffer|String} Chunk of data to unshift onto the read queue
+
+The `readable.unshift()` method pushes a chunk of data back into the internal
+buffer. This is useful in certain situations where a stream is being consumed by
+code that needs to "un-consume" some amount of data that it has optimistically
+pulled out of the source, so that the data can be passed on to some other party.
+
+*Note*: The `stream.unshift(chunk)` method cannot be called after the
+[`'end'`][] event has been emitted or a runtime error will be thrown.
+
+Developers using `stream.unshift()` often should consider switching to
+use of a [Transform][] stream instead. See the [API for Stream Implementers][]
+section for more information.
+
+```js
+// Pull off a header delimited by \n\n
+// use unshift() if we get too much
+// Call the callback with (error, header, stream)
+const StringDecoder = require('string_decoder').StringDecoder;
+function parseHeader(stream, callback) {
+  stream.on('error', callback);
+  stream.on('readable', onReadable);
+  const decoder = new StringDecoder('utf8');
+  var header = '';
+  function onReadable() {
+    var chunk;
+    while (null !== (chunk = stream.read())) {
+      var str = decoder.write(chunk);
+      if (str.match(/\n\n/)) {
+        // found the header boundary
+        var split = str.split(/\n\n/);
+        header += split.shift();
+        const remaining = split.join('\n\n');
+        const buf = Buffer.from(remaining, 'utf8');
+        if (buf.length)
+          stream.unshift(buf);
+        stream.removeListener('error', callback);
+        stream.removeListener('readable', onReadable);
+        // now the body of the message can be read from the stream.
+        callback(null, header, stream);
+      } else {
+        // still reading the header.
+        header += str;
+      }
+    }
+  }
+}
+```
+
+*Note*: Unlike [`stream.push(chunk)`][stream-push], `stream.unshift(chunk)`
+will not end the reading process by resetting the internal reading state of the
+stream. This can cause unexpected results if `readable.unshift()` is called
+during a read (i.e. from within a [`stream._read()`][stream-_read]
+implementation on a custom stream). Following the call to `readable.unshift()`
+with an immediate [`stream.push('')`][stream-push] will reset the reading state
+appropriately, however it is best to simply avoid calling `readable.unshift()`
+while in the process of performing a read.
+
+##### readable.wrap(stream)
+<!-- YAML
+added: v0.9.4
+-->
+
+* `stream` {Stream} An "old style" readable stream
+
+Versions of Node.js prior to v0.10 had streams that did not implement the
+entire `stream` module API as it is currently defined. (See [Compatibility][]
+for more information.)
+
+When using an older Node.js library that emits [`'data'`][] events and has a
+[`stream.pause()`][stream-pause] method that is advisory only, the
+`readable.wrap()` method can be used to create a [Readable][] stream that uses
+the old stream as its data source.
+
+It will rarely be necessary to use `readable.wrap()` but the method has been
+provided as a convenience for interacting with older Node.js applications and
+libraries.
+
+For example:
+
+```js
+const OldReader = require('./old-api-module.js').OldReader;
+const Readable = require('stream').Readable;
+const oreader = new OldReader;
+const myReader = new Readable().wrap(oreader);
+
+myReader.on('readable', () => {
+  myReader.read(); // etc.
+});
+```
+
+### Duplex and Transform Streams
+
+#### Class: stream.Duplex
+<!-- YAML
+added: v0.9.4
+-->
+
+<!--type=class-->
+
+Duplex streams are streams that implement both the [Readable][] and
+[Writable][] interfaces.
+
+Examples of Duplex streams include:
+
+* [TCP sockets][]
+* [zlib streams][zlib]
+* [crypto streams][crypto]
+
+#### Class: stream.Transform
+<!-- YAML
+added: v0.9.4
+-->
+
+<!--type=class-->
+
+Transform streams are [Duplex][] streams where the output is in some way
+related to the input. Like all [Duplex][] streams, Transform streams
+implement both the [Readable][] and [Writable][] interfaces.
+
+Examples of Transform streams include:
+
+* [zlib streams][zlib]
+* [crypto streams][crypto]
+
+
+## API for Stream Implementers
+
+<!--type=misc-->
+
+The `stream` module API has been designed to make it possible to easily
+implement streams using JavaScript's prototypical inheritance model.
+
+First, a stream developer would declare a new JavaScript class that extends one
+of the four basic stream classes (`stream.Writable`, `stream.Readable`,
+`stream.Duplex`, or `stream.Transform`), making sure the call the appropriate
+parent class constructor:
+
+```js
+const Writable = require('stream').Writable;
+
+class MyWritable extends Writable {
+  constructor(options) {
+    super(options);
+  }
+}
+```
+
+The new stream class must then implement one or more specific methods, depending
+on the type of stream being created, as detailed in the chart below:
+
+<table>
+  <thead>
+    <tr>
+      <th>
+        <p>Use-case</p>
+      </th>
+      <th>
+        <p>Class</p>
+      </th>
+      <th>
+        <p>Method(s) to implement</p>
+      </th>
+    </tr>
+  </thead>
+  <tr>
+    <td>
+      <p>Reading only</p>
+    </td>
+    <td>
+      <p>[Readable](#stream_class_stream_readable)</p>
+    </td>
+    <td>
+      <p><code>[_read][stream-_read]</code></p>
+    </td>
+  </tr>
+  <tr>
+    <td>
+      <p>Writing only</p>
+    </td>
+    <td>
+      <p>[Writable](#stream_class_stream_writable)</p>
+    </td>
+    <td>
+      <p><code>[_write][stream-_write]</code>, <code>[_writev][stream-_writev]</code></p>
+    </td>
+  </tr>
+  <tr>
+    <td>
+      <p>Reading and writing</p>
+    </td>
+    <td>
+      <p>[Duplex](#stream_class_stream_duplex)</p>
+    </td>
+    <td>
+      <p><code>[_read][stream-_read]</code>, <code>[_write][stream-_write]</code>, <code>[_writev][stream-_writev]</code></p>
+    </td>
+  </tr>
+  <tr>
+    <td>
+      <p>Operate on written data, then read the result</p>
+    </td>
+    <td>
+      <p>[Transform](#stream_class_stream_transform)</p>
+    </td>
+    <td>
+      <p><code>[_transform][stream-_transform]</code>, <code>[_flush][stream-_flush]</code></p>
+    </td>
+  </tr>
+</table>
+
+*Note*: The implementation code for a stream should *never* call the "public"
+methods of a stream that are intended for use by consumers (as described in
+the [API for Stream Consumers][] section). Doing so may lead to adverse
+side effects in application code consuming the stream.
+
+### Simplified Construction
+
+For many simple cases, it is possible to construct a stream without relying on
+inheritance. This can be accomplished by directly creating instances of the
+`stream.Writable`, `stream.Readable`, `stream.Duplex` or `stream.Transform`
+objects and passing appropriate methods as constructor options.
+
+For example:
+
+```js
+const Writable = require('stream').Writable;
+
+const myWritable = new Writable({
+  write(chunk, encoding, callback) {
+    // ...
+  }
+});
+```
+
+### Implementing a Writable Stream
+
+The `stream.Writable` class is extended to implement a [Writable][] stream.
+
+Custom Writable streams *must* call the `new stream.Writable([options])`
+constructor and implement the `writable._write()` method. The
+`writable._writev()` method *may* also be implemented.
+
+#### Constructor: new stream.Writable([options])
+
+* `options` {Object}
+  * `highWaterMark` {Number} Buffer level when
+    [`stream.write()`][stream-write] starts returning `false`. Defaults to
+    `16384` (16kb), or `16` for `objectMode` streams.
+  * `decodeStrings` {Boolean} Whether or not to decode strings into
+    Buffers before passing them to [`stream._write()`][stream-_write].
+    Defaults to `true`
+  * `objectMode` {Boolean} Whether or not the
+    [`stream.write(anyObj)`][stream-write] is a valid operation. When set,
+    it becomes possible to write JavaScript values other than string or
+    `Buffer` if supported by the stream implementation. Defaults to `false`
+  * `write` {Function} Implementation for the
+    [`stream._write()`][stream-_write] method.
+  * `writev` {Function} Implementation for the
+    [`stream._writev()`][stream-_writev] method.
+
+For example:
+
+```js
+const Writable = require('stream').Writable;
+
+class MyWritable extends Writable {
+  constructor(options) {
+    // Calls the stream.Writable() constructor
+    super(options);
+  }
+}
+```
+
+Or, when using pre-ES6 style constructors:
+
+```js
+const Writable = require('stream').Writable;
+const util = require('util');
+
+function MyWritable(options) {
+  if (!(this instanceof MyWritable))
+    return new MyWritable(options);
+  Writable.call(this, options);
+}
+util.inherits(MyWritable, Writable);
+```
+
+Or, using the Simplified Constructor approach:
+
+```js
+const Writable = require('stream').Writable;
+
+const myWritable = new Writable({
+  write(chunk, encoding, callback) {
+    // ...
+  },
+  writev(chunks, callback) {
+    // ...
+  }
+});
+```
+
+#### writable.\_write(chunk, encoding, callback)
+
+* `chunk` {Buffer|String} The chunk to be written. Will **always**
+  be a buffer unless the `decodeStrings` option was set to `false`.
+* `encoding` {String} If the chunk is a string, then `encoding` is the
+  character encoding of that string. If chunk is a `Buffer`, or if the
+  stream is operating in object mode, `encoding` may be ignored.
+* `callback` {Function} Call this function (optionally with an error
+  argument) when processing is complete for the supplied chunk.
+
+All Writable stream implementations must provide a
+[`writable._write()`][stream-_write] method to send data to the underlying
+resource.
+
+*Note*: [Transform][] streams provide their own implementation of the
+[`writable._write()`][stream-_write].
+
+*Note*: **This function MUST NOT be called by application code directly.** It
+should be implemented by child classes, and called only by the internal Writable
+class methods only.
+
+The `callback` method must be called to signal either that the write completed
+successfully or failed with an error. The first argument passed to the
+`callback` must be the `Error` object if the call failed or `null` if the
+write succeeded.
+
+It is important to note that all calls to `writable.write()` that occur between
+the time `writable._write()` is called and the `callback` is called will cause
+the written data to be buffered. Once the `callback` is invoked, the stream will
+emit a `'drain'` event. If a stream implementation is capable of processing
+multiple chunks of data at once, the `writable._writev()` method should be
+implemented.
+
+If the `decodeStrings` property is set in the constructor options, then
+`chunk` may be a string rather than a Buffer, and `encoding` will
+indicate the character encoding of the string. This is to support
+implementations that have an optimized handling for certain string
+data encodings. If the `decodeStrings` property is explicitly set to `false`,
+the `encoding` argument can be safely ignored, and `chunk` will always be a
+`Buffer`.
+
+The `writable._write()` method is prefixed with an underscore because it is
+internal to the class that defines it, and should never be called directly by
+user programs.
+
+#### writable.\_writev(chunks, callback)
+
+* `chunks` {Array} The chunks to be written. Each chunk has following
+  format: `{ chunk: ..., encoding: ... }`.
+* `callback` {Function} A callback function (optionally with an error
+  argument) to be invoked when processing is complete for the supplied chunks.
+
+*Note*: **This function MUST NOT be called by application code directly.** It
+should be implemented by child classes, and called only by the internal Writable
+class methods only.
+
+The `writable._writev()` method may be implemented in addition to
+`writable._write()` in stream implementations that are capable of processing
+multiple chunks of data at once. If implemented, the method will be called with
+all chunks of data currently buffered in the write queue.
+
+The `writable._writev()` method is prefixed with an underscore because it is
+internal to the class that defines it, and should never be called directly by
+user programs.
+
+#### Errors While Writing
+
+It is recommended that errors occurring during the processing of the
+`writable._write()` and `writable._writev()` methods are reported by invoking
+the callback and passing the error as the first argument. This will cause an
+`'error'` event to be emitted by the Writable. Throwing an Error from within
+`writable._write()` can result in expected and inconsistent behavior depending
+on how the stream is being used.  Using the callback ensures consistent and
+predictable handling of errors.
+
+```js
+const Writable = require('stream').Writable;
+
+const myWritable = new Writable({
+  write(chunk, encoding, callback) {
+    if (chunk.toString().indexOf('a') >= 0) {
+      callback(new Error('chunk is invalid'));
+    } else {
+      callback();
+    }
+  }
+});
+```
+
+#### An Example Writable Stream
+
+The following illustrates a rather simplistic (and somewhat pointless) custom
+Writable stream implementation. While this specific Writable stream instance
+is not of any real particular usefulness, the example illustrates each of the
+required elements of a custom [Writable][] stream instance:
+
+```js
+const Writable = require('stream').Writable;
+
+class MyWritable extends Writable {
+  constructor(options) {
+    super(options);
+  }
+
+  _write(chunk, encoding, callback) {
+    if (chunk.toString().indexOf('a') >= 0) {
+      callback(new Error('chunk is invalid'));
+    } else {
+      callback();
+    }
+  }
+}
+```
+
+### Implementing a Readable Stream
+
+The `stream.Readable` class is extended to implement a [Readable][] stream.
+
+Custom Readable streams *must* call the `new stream.Readable([options])`
+constructor and implement the `readable._read()` method.
+
+#### new stream.Readable([options])
+
+* `options` {Object}
+  * `highWaterMark` {Number} The maximum number of bytes to store in
+    the internal buffer before ceasing to read from the underlying
+    resource. Defaults to `16384` (16kb), or `16` for `objectMode` streams
+  * `encoding` {String} If specified, then buffers will be decoded to
+    strings using the specified encoding. Defaults to `null`
+  * `objectMode` {Boolean} Whether this stream should behave
+    as a stream of objects. Meaning that [`stream.read(n)`][stream-read] returns
+    a single value instead of a Buffer of size n. Defaults to `false`
+  * `read` {Function} Implementation for the [`stream._read()`][stream-_read]
+    method.
+
+For example:
+
+```js
+const Readable = require('stream').Readable;
+
+class MyReadable extends Readable {
+  constructor(options) {
+    // Calls the stream.Readable(options) constructor
+    super(options);
+  }
+}
+```
+
+Or, when using pre-ES6 style constructors:
+
+```js
+const Readable = require('stream').Readable;
+const util = require('util');
+
+function MyReadable(options) {
+  if (!(this instanceof MyReadable))
+    return new MyReadable(options);
+  Readable.call(this, options);
+}
+util.inherits(MyReadable, Readable);
+```
+
+Or, using the Simplified Constructor approach:
+
+```js
+const Readable = require('stream').Readable;
+
+const myReadable = new Readable({
+  read(size) {
+    // ...
+  }
+});
+```
+
+#### readable.\_read(size)
+
+* `size` {Number} Number of bytes to read asynchronously
+
+*Note*: **This function MUST NOT be called by application code directly.** It
+should be implemented by child classes, and called only by the internal Readable
+class methods only.
+
+All Readable stream implementations must provide an implementation of the
+`readable._read()` method to fetch data from the underlying resource.
+
+When `readable._read()` is called, if data is available from the resource, the
+implementation should begin pushing that data into the read queue using the
+[`this.push(dataChunk)`][stream-push] method. `_read()` should continue reading
+from the resource and pushing data until `readable.push()` returns `false`. Only
+when `_read()` is called again after it has stopped should it resume pushing
+additional data onto the queue.
+
+*Note*: Once the `readable._read()` method has been called, it will not be
+called again until the [`readable.push()`][stream-push] method is called.
+
+The `size` argument is advisory. For implementations where a "read" is a
+single operation that returns data can use the `size` argument to determine how
+much data to fetch. Other implementations may ignore this argument and simply
+provide data whenever it becomes available. There is no need to "wait" until
+`size` bytes are available before calling [`stream.push(chunk)`][stream-push].
+
+The `readable._read()` method is prefixed with an underscore because it is
+internal to the class that defines it, and should never be called directly by
+user programs.
+
+#### readable.push(chunk[, encoding])
+
+* `chunk` {Buffer|Null|String} Chunk of data to push into the read queue
+* `encoding` {String} Encoding of String chunks.  Must be a valid
+  Buffer encoding, such as `'utf8'` or `'ascii'`
+* Returns {Boolean} `true` if additional chunks of data may continued to be
+  pushed; `false` otherwise.
+
+When `chunk` is a `Buffer` or `string`, the `chunk` of data will be added to the
+internal queue for users of the stream to consume. Passing `chunk` as `null`
+signals the end of the stream (EOF), after which no more data can be written.
+
+When the Readable is operating in paused mode, the data added with
+`readable.push()` can be read out by calling the
+[`readable.read()`][stream-read] method when the [`'readable'`][] event is
+emitted.
+
+When the Readable is operating in flowing mode, the data added with
+`readable.push()` will be delivered by emitting a `'data'` event.
+
+The `readable.push()` method is designed to be as flexible as possible. For
+example, when wrapping a lower-level source that provides some form of
+pause/resume mechanism, and a data callback, the low-level source can be wrapped
+by the custom Readable instance as illustrated in the following example:
+
+```js
+// source is an object with readStop() and readStart() methods,
+// and an `ondata` member that gets called when it has data, and
+// an `onend` member that gets called when the data is over.
+
+class SourceWrapper extends Readable {
+  constructor(options) {
+    super(options);
+
+    this._source = getLowlevelSourceObject();
+
+    // Every time there's data, push it into the internal buffer.
+    this._source.ondata = (chunk) => {
+      // if push() returns false, then stop reading from source
+      if (!this.push(chunk))
+        this._source.readStop();
+    };
+
+    // When the source ends, push the EOF-signaling `null` chunk
+    this._source.onend = () => {
+      this.push(null);
+    };
+  }
+  // _read will be called when the stream wants to pull more data in
+  // the advisory size argument is ignored in this case.
+  _read(size) {
+    this._source.readStart();
+  }
+}
+```
+*Note*: The `readable.push()` method is intended be called only by Readable
+Implementers, and only from within the `readable._read()` method.
+
+#### Errors While Reading
+
+It is recommended that errors occurring during the processing of the
+`readable._read()` method are emitted using the `'error'` event rather than
+being thrown. Throwing an Error from within `readable._read()` can result in
+expected and inconsistent behavior depending on whether the stream is operating
+in flowing or paused mode. Using the `'error'` event ensures consistent and
+predictable handling of errors.
+
+```js
+const Readable = require('stream').Readable;
+
+const myReadable = new Readable({
+  read(size) {
+    if (checkSomeErrorCondition()) {
+      process.nextTick(() => this.emit('error', err));
+      return;
+    }
+    // do some work
+  }
+});
+```
+
+#### An Example Counting Stream
+
+<!--type=example-->
+
+The following is a basic example of a Readable stream that emits the numerals
+from 1 to 1,000,000 in ascending order, and then ends.
+
+```js
+const Readable = require('stream').Readable;
+
+class Counter extends Readable {
+  constructor(opt) {
+    super(opt);
+    this._max = 1000000;
+    this._index = 1;
+  }
+
+  _read() {
+    var i = this._index++;
+    if (i > this._max)
+      this.push(null);
+    else {
+      var str = '' + i;
+      var buf = Buffer.from(str, 'ascii');
+      this.push(buf);
+    }
+  }
+}
+```
+
+### Implementing a Duplex Stream
+
+A [Duplex][] stream is one that implements both [Readable][] and [Writable][],
+such as a TCP socket connection.
+
+Because Javascript does not have support for multiple inheritance, the
+`stream.Duplex` class is extended to implement a [Duplex][] stream (as opposed
+to extending the `stream.Readable` *and* `stream.Writable` classes).
+
+*Note*: The `stream.Duplex` class prototypically inherits from `stream.Readable`
+and parasitically from `stream.Writable`.
+
+Custom Duplex streams *must* call the `new stream.Duplex([options])`
+constructor and implement *both* the `readable._read()` and
+`writable._write()` methods.
+
+#### new stream.Duplex(options)
+
+* `options` {Object} Passed to both Writable and Readable
+  constructors. Also has the following fields:
+  * `allowHalfOpen` {Boolean} Defaults to `true`. If set to `false`, then
+    the stream will automatically end the readable side when the
+    writable side ends and vice versa.
+  * `readableObjectMode` {Boolean} Defaults to `false`. Sets `objectMode`
+    for readable side of the stream. Has no effect if `objectMode`
+    is `true`.
+  * `writableObjectMode` {Boolean} Defaults to `false`. Sets `objectMode`
+    for writable side of the stream. Has no effect if `objectMode`
+    is `true`.
+
+For example:
+
+```js
+const Duplex = require('stream').Duplex;
+
+class MyDuplex extends Duplex {
+  constructor(options) {
+    super(options);
+  }
+}
+```
+
+Or, when using pre-ES6 style constructors:
+
+```js
+const Duplex = require('stream').Duplex;
+const util = require('util');
+
+function MyDuplex(options) {
+  if (!(this instanceof MyDuplex))
+    return new MyDuplex(options);
+  Duplex.call(this, options);
+}
+util.inherits(MyDuplex, Duplex);
+```
+
+Or, using the Simplified Constructor approach:
+
+```js
+const Duplex = require('stream').Duplex;
+
+const myDuplex = new Duplex({
+  read(size) {
+    // ...
+  },
+  write(chunk, encoding, callback) {
+    // ...
+  }
+});
+```
+
+#### An Example Duplex Stream
+
+The following illustrates a simple example of a Duplex stream that wraps a
+hypothetical lower-level source object to which data can be written, and
+from which data can be read, albeit using an API that is not compatible with
+Node.js streams.
+The following illustrates a simple example of a Duplex stream that buffers
+incoming written data via the [Writable][] interface that is read back out
+via the [Readable][] interface.
+
+```js
+const Duplex = require('stream').Duplex;
+const kSource = Symbol('source');
+
+class MyDuplex extends Duplex {
+  constructor(source, options) {
+    super(options);
+    this[kSource] = source;
+  }
+
+  _write(chunk, encoding, callback) {
+    // The underlying source only deals with strings
+    if (Buffer.isBuffer(chunk))
+      chunk = chunk.toString(encoding);
+    this[kSource].writeSomeData(chunk, encoding);
+    callback();
+  }
+
+  _read(size) {
+    this[kSource].fetchSomeData(size, (data, encoding) => {
+      this.push(Buffer.from(data, encoding));
+    });
+  }
+}
+```
+
+The most important aspect of a Duplex stream is that the Readable and Writable
+sides operate independently of one another despite co-existing within a single
+object instance.
+
+#### Object Mode Duplex Streams
+
+For Duplex streams, `objectMode` can be set exclusively for either the Readable
+or Writable side using the `readableObjectMode` and `writableObjectMode` options
+respectively.
+
+In the following example, for instance, a new Transform stream (which is a
+type of [Duplex][] stream) is created that has an object mode Writable side
+that accepts JavaScript numbers that are converted to hexidecimal strings on
+the Readable side.
+
+```js
+const Transform = require('stream').Transform;
+
+// All Transform streams are also Duplex Streams
+const myTransform = new Transform({
+  writableObjectMode: true,
+
+  transform(chunk, encoding, callback) {
+    // Coerce the chunk to a number if necessary
+    chunk |= 0;
+
+    // Transform the chunk into something else.
+    const data = chunk.toString(16);
+
+    // Push the data onto the readable queue.
+    callback(null, '0'.repeat(data.length % 2) + data);
+  }
+});
+
+myTransform.setEncoding('ascii');
+myTransform.on('data', (chunk) => console.log(chunk));
+
+myTransform.write(1);
+  // Prints: 01
+myTransform.write(10);
+  // Prints: 0a
+myTransform.write(100);
+  // Prints: 64
+```
+
+### Implementing a Transform Stream
+
+A [Transform][] stream is a [Duplex][] stream where the output is computed
+in some way from the input. Examples include [zlib][] streams or [crypto][]
+streams that compress, encrypt, or decrypt data.
+
+*Note*: There is no requirement that the output be the same size as the input,
+the same number of chunks, or arrive at the same time. For example, a
+Hash stream will only ever have a single chunk of output which is
+provided when the input is ended. A `zlib` stream will produce output
+that is either much smaller or much larger than its input.
+
+The `stream.Transform` class is extended to implement a [Transform][] stream.
+
+The `stream.Transform` class prototypically inherits from `stream.Duplex` and
+implements its own versions of the `writable._write()` and `readable._read()`
+methods. Custom Transform implementations *must* implement the
+[`transform._transform()`][stream-_transform] method and *may* also implement
+the [`transform._flush()`][stream-_flush] method.
+
+*Note*: Care must be taken when using Transform streams in that data written
+to the stream can cause the Writable side of the stream to become paused if
+the output on the Readable side is not consumed.
+
+#### new stream.Transform([options])
+
+* `options` {Object} Passed to both Writable and Readable
+  constructors. Also has the following fields:
+  * `transform` {Function} Implementation for the
+    [`stream._transform()`][stream-_transform] method.
+  * `flush` {Function} Implementation for the [`stream._flush()`][stream-_flush]
+    method.
+
+For example:
+
+```js
+const Transform = require('stream').Transform;
+
+class MyTransform extends Transform {
+  constructor(options) {
+    super(options);
+  }
+}
+```
+
+Or, when using pre-ES6 style constructors:
+
+```js
+const Transform = require('stream').Transform;
+const util = require('util');
+
+function MyTransform(options) {
+  if (!(this instanceof MyTransform))
+    return new MyTransform(options);
+  Transform.call(this, options);
+}
+util.inherits(MyTransform, Transform);
+```
+
+Or, using the Simplified Constructor approach:
+
+```js
+const Transform = require('stream').Transform;
+
+const myTransform = new Transform({
+  transform(chunk, encoding, callback) {
+    // ...
+  }
+});
+```
+
+#### Events: 'finish' and 'end'
+
+The [`'finish'`][] and [`'end'`][] events are from the `stream.Writable`
+and `stream.Readable` classes, respectively. The `'finish'` event is emitted
+after [`stream.end()`][stream-end] is called and all chunks have been processed
+by [`stream._transform()`][stream-_transform]. The `'end'` event is emitted
+after all data has been output, which occurs after the callback in
+[`transform._flush()`][stream-_flush] has been called.
+
+#### transform.\_flush(callback)
+
+* `callback` {Function} A callback function (optionally with an error
+  argument) to be called when remaining data has been flushed.
+
+*Note*: **This function MUST NOT be called by application code directly.** It
+should be implemented by child classes, and called only by the internal Readable
+class methods only.
+
+In some cases, a transform operation may need to emit an additional bit of
+data at the end of the stream. For example, a `zlib` compression stream will
+store an amount of internal state used to optimally compress the output. When
+the stream ends, however, that additional data needs to be flushed so that the
+compressed data will be complete.
+
+Custom [Transform][] implementations *may* implement the `transform._flush()`
+method. This will be called when there is no more written data to be consumed,
+but before the [`'end'`][] event is emitted signaling the end of the
+[Readable][] stream.
+
+Within the `transform._flush()` implementation, the `readable.push()` method
+may be called zero or more times, as appropriate. The `callback` function must
+be called when the flush operation is complete.
+
+The `transform._flush()` method is prefixed with an underscore because it is
+internal to the class that defines it, and should never be called directly by
+user programs.
+
+#### transform.\_transform(chunk, encoding, callback)
+
+* `chunk` {Buffer|String} The chunk to be transformed. Will **always**
+  be a buffer unless the `decodeStrings` option was set to `false`.
+* `encoding` {String} If the chunk is a string, then this is the
+  encoding type. If chunk is a buffer, then this is the special
+  value - 'buffer', ignore it in this case.
+* `callback` {Function} A callback function (optionally with an error
+  argument and data) to be called after the supplied `chunk` has been
+  processed.
+
+*Note*: **This function MUST NOT be called by application code directly.** It
+should be implemented by child classes, and called only by the internal Readable
+class methods only.
+
+All Transform stream implementations must provide a `_transform()`
+method to accept input and produce output. The `transform._transform()`
+implementation handles the bytes being written, computes an output, then passes
+that output off to the readable portion using the `readable.push()` method.
+
+The `transform.push()` method may be called zero or more times to generate
+output from a single input chunk, depending on how much is to be output
+as a result of the chunk.
+
+It is possible that no output is generated from any given chunk of input data.
+
+The `callback` function must be called only when the current chunk is completely
+consumed. The first argument passed to the `callback` must be an `Error` object
+if an error occurred while processing the input or `null` otherwise. If a second
+argument is passed to the `callback`, it will be forwarded on to the
+`readable.push()` method. In other words the following are equivalent:
+
+```js
+transform.prototype._transform = function (data, encoding, callback) {
+  this.push(data);
+  callback();
+};
+
+transform.prototype._transform = function (data, encoding, callback) {
+  callback(null, data);
+};
+```
+
+The `transform._transform()` method is prefixed with an underscore because it
+is internal to the class that defines it, and should never be called directly by
+user programs.
+
+#### Class: stream.PassThrough
+
+The `stream.PassThrough` class is a trivial implementation of a [Transform][]
+stream that simply passes the input bytes across to the output. Its purpose is
+primarily for examples and testing, but there are some use cases where
+`stream.PassThrough` is useful as a building block for novel sorts of streams.
+
+## Additional Notes
+
+<!--type=misc-->
+
+### Compatibility with Older Node.js Versions
+
+<!--type=misc-->
+
+In versions of Node.js prior to v0.10, the Readable stream interface was
+simpler, but also less powerful and less useful.
+
+* Rather than waiting for calls the [`stream.read()`][stream-read] method,
+  [`'data'`][] events would begin emitting immediately. Applications that
+  would need to perform some amount of work to decide how to handle data
+  were required to store read data into buffers so the data would not be lost.
+* The [`stream.pause()`][stream-pause] method was advisory, rather than
+  guaranteed. This meant that it was still necessary to be prepared to receive
+  [`'data'`][] events *even when the stream was in a paused state*.
+
+In Node.js v0.10, the [Readable][] class was added. For backwards compatibility
+with older Node.js programs, Readable streams switch into "flowing mode" when a
+[`'data'`][] event handler is added, or when the
+[`stream.resume()`][stream-resume] method is called. The effect is that, even
+when not using the new [`stream.read()`][stream-read] method and
+[`'readable'`][] event, it is no longer necessary to worry about losing
+[`'data'`][] chunks.
+
+While most applications will continue to function normally, this introduces an
+edge case in the following conditions:
+
+* No [`'data'`][] event listener is added.
+* The [`stream.resume()`][stream-resume] method is never called.
+* The stream is not piped to any writable destination.
+
+For example, consider the following code:
+
+```js
+// WARNING!  BROKEN!
+net.createServer((socket) => {
+
+  // we add an 'end' method, but never consume the data
+  socket.on('end', () => {
+    // It will never get here.
+    socket.end('The message was received but was not processed.\n');
+  });
+
+}).listen(1337);
+```
+
+In versions of Node.js prior to v0.10, the incoming message data would be
+simply discarded. However, in Node.js v0.10 and beyond, the socket remains
+paused forever.
+
+The workaround in this situation is to call the
+[`stream.resume()`][stream-resume] method to begin the flow of data:
+
+```js
+// Workaround
+net.createServer((socket) => {
+
+  socket.on('end', () => {
+    socket.end('The message was received but was not processed.\n');
+  });
+
+  // start the flow of data, discarding it.
+  socket.resume();
+
+}).listen(1337);
+```
+
+In addition to new Readable streams switching into flowing mode,
+pre-v0.10 style streams can be wrapped in a Readable class using the
+[`readable.wrap()`][`stream.wrap()`] method.
+
+
+### `readable.read(0)`
+
+There are some cases where it is necessary to trigger a refresh of the
+underlying readable stream mechanisms, without actually consuming any
+data. In such cases, it is possible to call `readable.read(0)`, which will
+always return `null`.
+
+If the internal read buffer is below the `highWaterMark`, and the
+stream is not currently reading, then calling `stream.read(0)` will trigger
+a low-level [`stream._read()`][stream-_read] call.
+
+While most applications will almost never need to do this, there are
+situations within Node.js where this is done, particularly in the
+Readable stream class internals.
+
+### `readable.push('')`
+
+Use of `readable.push('')` is not recommended.
+
+Pushing a zero-byte string or `Buffer` to a stream that is not in object mode
+has an interesting side effect. Because it *is* a call to
+[`readable.push()`][stream-push], the call will end the reading process.
+However, because the argument is an empty string, no data is added to the
+readable buffer so there is nothing for a user to consume.
+
+[`'data'`]: #stream_event_data
+[`'drain'`]: #stream_event_drain
+[`'end'`]: #stream_event_end
+[`'finish'`]: #stream_event_finish
+[`'readable'`]: #stream_event_readable
+[`buf.toString(encoding)`]: https://nodejs.org/docs/v6.3.1/api/buffer.html#buffer_buf_tostring_encoding_start_end
+[`EventEmitter`]: https://nodejs.org/docs/v6.3.1/api/events.html#events_class_eventemitter
+[`process.stderr`]: https://nodejs.org/docs/v6.3.1/api/process.html#process_process_stderr
+[`process.stdin`]: https://nodejs.org/docs/v6.3.1/api/process.html#process_process_stdin
+[`process.stdout`]: https://nodejs.org/docs/v6.3.1/api/process.html#process_process_stdout
+[`stream.cork()`]: #stream_writable_cork
+[`stream.pipe()`]: #stream_readable_pipe_destination_options
+[`stream.uncork()`]: #stream_writable_uncork
+[`stream.unpipe()`]: #stream_readable_unpipe_destination
+[`stream.wrap()`]: #stream_readable_wrap_stream
+[`tls.CryptoStream`]: https://nodejs.org/docs/v6.3.1/api/tls.html#tls_class_cryptostream
+[API for Stream Consumers]: #stream_api_for_stream_consumers
+[API for Stream Implementers]: #stream_api_for_stream_implementers
+[child process stdin]: https://nodejs.org/docs/v6.3.1/api/child_process.html#child_process_child_stdin
+[child process stdout and stderr]: https://nodejs.org/docs/v6.3.1/api/child_process.html#child_process_child_stdout
+[Compatibility]: #stream_compatibility_with_older_node_js_versions
+[crypto]: crypto.html
+[Duplex]: #stream_class_stream_duplex
+[fs read streams]: https://nodejs.org/docs/v6.3.1/api/fs.html#fs_class_fs_readstream
+[fs write streams]: https://nodejs.org/docs/v6.3.1/api/fs.html#fs_class_fs_writestream
+[`fs.createReadStream()`]: https://nodejs.org/docs/v6.3.1/api/fs.html#fs_fs_createreadstream_path_options
+[`fs.createWriteStream()`]: https://nodejs.org/docs/v6.3.1/api/fs.html#fs_fs_createwritestream_path_options
+[`net.Socket`]: https://nodejs.org/docs/v6.3.1/api/net.html#net_class_net_socket
+[`zlib.createDeflate()`]: https://nodejs.org/docs/v6.3.1/api/zlib.html#zlib_zlib_createdeflate_options
+[HTTP requests, on the client]: https://nodejs.org/docs/v6.3.1/api/http.html#http_class_http_clientrequest
+[HTTP responses, on the server]: https://nodejs.org/docs/v6.3.1/api/http.html#http_class_http_serverresponse
+[http-incoming-message]: https://nodejs.org/docs/v6.3.1/api/http.html#http_class_http_incomingmessage
+[Object mode]: #stream_object_mode
+[Readable]: #stream_class_stream_readable
+[SimpleProtocol v2]: #stream_example_simpleprotocol_parser_v2
+[stream-_flush]: #stream_transform_flush_callback
+[stream-_read]: #stream_readable_read_size_1
+[stream-_transform]: #stream_transform_transform_chunk_encoding_callback
+[stream-_write]: #stream_writable_write_chunk_encoding_callback_1
+[stream-_writev]: #stream_writable_writev_chunks_callback
+[stream-end]: #stream_writable_end_chunk_encoding_callback
+[stream-pause]: #stream_readable_pause
+[stream-push]: #stream_readable_push_chunk_encoding
+[stream-read]: #stream_readable_read_size
+[stream-resume]: #stream_readable_resume
+[stream-write]: #stream_writable_write_chunk_encoding_callback
+[TCP sockets]: https://nodejs.org/docs/v6.3.1/api/net.html#net_class_net_socket
+[Transform]: #stream_class_stream_transform
+[Writable]: #stream_class_stream_writable
+[zlib]: zlib.html
diff --git a/node_modules/readable-stream/doc/wg-meetings/2015-01-30.md b/node_modules/readable-stream/doc/wg-meetings/2015-01-30.md
new file mode 100644
index 000000000..83275f192
--- /dev/null
+++ b/node_modules/readable-stream/doc/wg-meetings/2015-01-30.md
@@ -0,0 +1,60 @@
+# streams WG Meeting 2015-01-30
+
+## Links
+
+* **Google Hangouts Video**: http://www.youtube.com/watch?v=I9nDOSGfwZg
+* **GitHub Issue**: https://github.com/iojs/readable-stream/issues/106
+* **Original Minutes Google Doc**: https://docs.google.com/document/d/17aTgLnjMXIrfjgNaTUnHQO7m3xgzHR2VXBTmi03Qii4/
+
+## Agenda
+
+Extracted from https://github.com/iojs/readable-stream/labels/wg-agenda prior to meeting.
+
+* adopt a charter [#105](https://github.com/iojs/readable-stream/issues/105)
+* release and versioning strategy [#101](https://github.com/iojs/readable-stream/issues/101)
+* simpler stream creation [#102](https://github.com/iojs/readable-stream/issues/102)
+* proposal: deprecate implicit flowing of streams [#99](https://github.com/iojs/readable-stream/issues/99)
+
+## Minutes
+
+### adopt a charter
+
+* group: +1's all around
+
+### What versioning scheme should be adopted?
+* group: +1’s 3.0.0
+* domenic+group: pulling in patches from other sources where appropriate
+* mikeal: version independently, suggesting versions for io.js
+* mikeal+domenic: work with TC to notify in advance of changes
+simpler stream creation
+
+### streamline creation of streams
+* sam: streamline creation of streams
+* domenic: nice simple solution posted
+  but, we lose the opportunity to change the model
+  may not be backwards incompatible (double check keys)
+
+  **action item:** domenic will check
+
+### remove implicit flowing of streams on(‘data’)
+* add isFlowing / isPaused
+* mikeal: worrying that we’re documenting polyfill methods – confuses users
+* domenic: more reflective API is probably good, with warning labels for users
+* new section for mad scientists (reflective stream access)
+* calvin: name the “third state”
+* mikeal: maybe borrow the name from whatwg?
+* domenic: we’re missing the “third state”
+* consensus: kind of difficult to name the third state
+* mikeal: figure out differences in states / compat
+* mathias: always flow on data – eliminates third state
+  * explore what it breaks
+
+**action items:**
+* ask isaac for ability to list packages by what public io.js APIs they use (esp. Stream)
+* ask rod/build for infrastructure
+* **chris**: explore the “flow on data” approach
+* add isPaused/isFlowing
+* add new docs section
+* move isPaused to that section
+
+
diff --git a/node_modules/readable-stream/float.patch b/node_modules/readable-stream/float.patch
deleted file mode 100644
index b984607a4..000000000
--- a/node_modules/readable-stream/float.patch
+++ /dev/null
@@ -1,923 +0,0 @@
-diff --git a/lib/_stream_duplex.js b/lib/_stream_duplex.js
-index c5a741c..a2e0d8e 100644
---- a/lib/_stream_duplex.js
-+++ b/lib/_stream_duplex.js
-@@ -26,8 +26,8 @@
- 
- module.exports = Duplex;
- var util = require('util');
--var Readable = require('_stream_readable');
--var Writable = require('_stream_writable');
-+var Readable = require('./_stream_readable');
-+var Writable = require('./_stream_writable');
- 
- util.inherits(Duplex, Readable);
- 
-diff --git a/lib/_stream_passthrough.js b/lib/_stream_passthrough.js
-index a5e9864..330c247 100644
---- a/lib/_stream_passthrough.js
-+++ b/lib/_stream_passthrough.js
-@@ -25,7 +25,7 @@
- 
- module.exports = PassThrough;
- 
--var Transform = require('_stream_transform');
-+var Transform = require('./_stream_transform');
- var util = require('util');
- util.inherits(PassThrough, Transform);
- 
-diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
-index 0c3fe3e..90a8298 100644
---- a/lib/_stream_readable.js
-+++ b/lib/_stream_readable.js
-@@ -23,10 +23,34 @@ module.exports = Readable;
- Readable.ReadableState = ReadableState;
- 
- var EE = require('events').EventEmitter;
-+if (!EE.listenerCount) EE.listenerCount = function(emitter, type) {
-+  return emitter.listeners(type).length;
-+};
-+
-+if (!global.setImmediate) global.setImmediate = function setImmediate(fn) {
-+  return setTimeout(fn, 0);
-+};
-+if (!global.clearImmediate) global.clearImmediate = function clearImmediate(i) {
-+  return clearTimeout(i);
-+};
-+
- var Stream = require('stream');
- var util = require('util');
-+if (!util.isUndefined) {
-+  var utilIs = require('core-util-is');
-+  for (var f in utilIs) {
-+    util[f] = utilIs[f];
-+  }
-+}
- var StringDecoder;
--var debug = util.debuglog('stream');
-+var debug;
-+if (util.debuglog)
-+  debug = util.debuglog('stream');
-+else try {
-+  debug = require('debuglog')('stream');
-+} catch (er) {
-+  debug = function() {};
-+}
- 
- util.inherits(Readable, Stream);
- 
-@@ -380,7 +404,7 @@ function chunkInvalid(state, chunk) {
- 
- 
- function onEofChunk(stream, state) {
--  if (state.decoder && !state.ended) {
-+  if (state.decoder && !state.ended && state.decoder.end) {
-     var chunk = state.decoder.end();
-     if (chunk && chunk.length) {
-       state.buffer.push(chunk);
-diff --git a/lib/_stream_transform.js b/lib/_stream_transform.js
-index b1f9fcc..b0caf57 100644
---- a/lib/_stream_transform.js
-+++ b/lib/_stream_transform.js
-@@ -64,8 +64,14 @@
- 
- module.exports = Transform;
- 
--var Duplex = require('_stream_duplex');
-+var Duplex = require('./_stream_duplex');
- var util = require('util');
-+if (!util.isUndefined) {
-+  var utilIs = require('core-util-is');
-+  for (var f in utilIs) {
-+    util[f] = utilIs[f];
-+  }
-+}
- util.inherits(Transform, Duplex);
- 
- 
-diff --git a/lib/_stream_writable.js b/lib/_stream_writable.js
-index ba2e920..f49288b 100644
---- a/lib/_stream_writable.js
-+++ b/lib/_stream_writable.js
-@@ -27,6 +27,12 @@ module.exports = Writable;
- Writable.WritableState = WritableState;
- 
- var util = require('util');
-+if (!util.isUndefined) {
-+  var utilIs = require('core-util-is');
-+  for (var f in utilIs) {
-+    util[f] = utilIs[f];
-+  }
-+}
- var Stream = require('stream');
- 
- util.inherits(Writable, Stream);
-@@ -119,7 +125,7 @@ function WritableState(options, stream) {
- function Writable(options) {
-   // Writable ctor is applied to Duplexes, though they're not
-   // instanceof Writable, they're instanceof Readable.
--  if (!(this instanceof Writable) && !(this instanceof Stream.Duplex))
-+  if (!(this instanceof Writable) && !(this instanceof require('./_stream_duplex')))
-     return new Writable(options);
- 
-   this._writableState = new WritableState(options, this);
-diff --git a/test/simple/test-stream-big-push.js b/test/simple/test-stream-big-push.js
-index e3787e4..8cd2127 100644
---- a/test/simple/test-stream-big-push.js
-+++ b/test/simple/test-stream-big-push.js
-@@ -21,7 +21,7 @@
- 
- var common = require('../common');
- var assert = require('assert');
--var stream = require('stream');
-+var stream = require('../../');
- var str = 'asdfasdfasdfasdfasdf';
- 
- var r = new stream.Readable({
-diff --git a/test/simple/test-stream-end-paused.js b/test/simple/test-stream-end-paused.js
-index bb73777..d40efc7 100644
---- a/test/simple/test-stream-end-paused.js
-+++ b/test/simple/test-stream-end-paused.js
-@@ -25,7 +25,7 @@ var gotEnd = false;
- 
- // Make sure we don't miss the end event for paused 0-length streams
- 
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- var stream = new Readable();
- var calledRead = false;
- stream._read = function() {
-diff --git a/test/simple/test-stream-pipe-after-end.js b/test/simple/test-stream-pipe-after-end.js
-index b46ee90..0be8366 100644
---- a/test/simple/test-stream-pipe-after-end.js
-+++ b/test/simple/test-stream-pipe-after-end.js
-@@ -22,8 +22,8 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var Readable = require('_stream_readable');
--var Writable = require('_stream_writable');
-+var Readable = require('../../lib/_stream_readable');
-+var Writable = require('../../lib/_stream_writable');
- var util = require('util');
- 
- util.inherits(TestReadable, Readable);
-diff --git a/test/simple/test-stream-pipe-cleanup.js b/test/simple/test-stream-pipe-cleanup.js
-deleted file mode 100644
-index f689358..0000000
---- a/test/simple/test-stream-pipe-cleanup.js
-+++ /dev/null
-@@ -1,122 +0,0 @@
--// Copyright Joyent, Inc. and other Node contributors.
--//
--// Permission is hereby granted, free of charge, to any person obtaining a
--// copy of this software and associated documentation files (the
--// "Software"), to deal in the Software without restriction, including
--// without limitation the rights to use, copy, modify, merge, publish,
--// distribute, sublicense, and/or sell copies of the Software, and to permit
--// persons to whom the Software is furnished to do so, subject to the
--// following conditions:
--//
--// The above copyright notice and this permission notice shall be included
--// in all copies or substantial portions of the Software.
--//
--// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
--// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
--// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
--// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
--// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
--// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
--// USE OR OTHER DEALINGS IN THE SOFTWARE.
--
--// This test asserts that Stream.prototype.pipe does not leave listeners
--// hanging on the source or dest.
--
--var common = require('../common');
--var stream = require('stream');
--var assert = require('assert');
--var util = require('util');
--
--function Writable() {
--  this.writable = true;
--  this.endCalls = 0;
--  stream.Stream.call(this);
--}
--util.inherits(Writable, stream.Stream);
--Writable.prototype.end = function() {
--  this.endCalls++;
--};
--
--Writable.prototype.destroy = function() {
--  this.endCalls++;
--};
--
--function Readable() {
--  this.readable = true;
--  stream.Stream.call(this);
--}
--util.inherits(Readable, stream.Stream);
--
--function Duplex() {
--  this.readable = true;
--  Writable.call(this);
--}
--util.inherits(Duplex, Writable);
--
--var i = 0;
--var limit = 100;
--
--var w = new Writable();
--
--var r;
--
--for (i = 0; i < limit; i++) {
--  r = new Readable();
--  r.pipe(w);
--  r.emit('end');
--}
--assert.equal(0, r.listeners('end').length);
--assert.equal(limit, w.endCalls);
--
--w.endCalls = 0;
--
--for (i = 0; i < limit; i++) {
--  r = new Readable();
--  r.pipe(w);
--  r.emit('close');
--}
--assert.equal(0, r.listeners('close').length);
--assert.equal(limit, w.endCalls);
--
--w.endCalls = 0;
--
--r = new Readable();
--
--for (i = 0; i < limit; i++) {
--  w = new Writable();
--  r.pipe(w);
--  w.emit('close');
--}
--assert.equal(0, w.listeners('close').length);
--
--r = new Readable();
--w = new Writable();
--var d = new Duplex();
--r.pipe(d); // pipeline A
--d.pipe(w); // pipeline B
--assert.equal(r.listeners('end').length, 2);   // A.onend, A.cleanup
--assert.equal(r.listeners('close').length, 2); // A.onclose, A.cleanup
--assert.equal(d.listeners('end').length, 2);   // B.onend, B.cleanup
--assert.equal(d.listeners('close').length, 3); // A.cleanup, B.onclose, B.cleanup
--assert.equal(w.listeners('end').length, 0);
--assert.equal(w.listeners('close').length, 1); // B.cleanup
--
--r.emit('end');
--assert.equal(d.endCalls, 1);
--assert.equal(w.endCalls, 0);
--assert.equal(r.listeners('end').length, 0);
--assert.equal(r.listeners('close').length, 0);
--assert.equal(d.listeners('end').length, 2);   // B.onend, B.cleanup
--assert.equal(d.listeners('close').length, 2); // B.onclose, B.cleanup
--assert.equal(w.listeners('end').length, 0);
--assert.equal(w.listeners('close').length, 1); // B.cleanup
--
--d.emit('end');
--assert.equal(d.endCalls, 1);
--assert.equal(w.endCalls, 1);
--assert.equal(r.listeners('end').length, 0);
--assert.equal(r.listeners('close').length, 0);
--assert.equal(d.listeners('end').length, 0);
--assert.equal(d.listeners('close').length, 0);
--assert.equal(w.listeners('end').length, 0);
--assert.equal(w.listeners('close').length, 0);
-diff --git a/test/simple/test-stream-pipe-error-handling.js b/test/simple/test-stream-pipe-error-handling.js
-index c5d724b..c7d6b7d 100644
---- a/test/simple/test-stream-pipe-error-handling.js
-+++ b/test/simple/test-stream-pipe-error-handling.js
-@@ -21,7 +21,7 @@
- 
- var common = require('../common');
- var assert = require('assert');
--var Stream = require('stream').Stream;
-+var Stream = require('../../').Stream;
- 
- (function testErrorListenerCatches() {
-   var source = new Stream();
-diff --git a/test/simple/test-stream-pipe-event.js b/test/simple/test-stream-pipe-event.js
-index cb9d5fe..56f8d61 100644
---- a/test/simple/test-stream-pipe-event.js
-+++ b/test/simple/test-stream-pipe-event.js
-@@ -20,7 +20,7 @@
- // USE OR OTHER DEALINGS IN THE SOFTWARE.
- 
- var common = require('../common');
--var stream = require('stream');
-+var stream = require('../../');
- var assert = require('assert');
- var util = require('util');
- 
-diff --git a/test/simple/test-stream-push-order.js b/test/simple/test-stream-push-order.js
-index f2e6ec2..a5c9bf9 100644
---- a/test/simple/test-stream-push-order.js
-+++ b/test/simple/test-stream-push-order.js
-@@ -20,7 +20,7 @@
- // USE OR OTHER DEALINGS IN THE SOFTWARE.
- 
- var common = require('../common.js');
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- var assert = require('assert');
- 
- var s = new Readable({
-diff --git a/test/simple/test-stream-push-strings.js b/test/simple/test-stream-push-strings.js
-index 06f43dc..1701a9a 100644
---- a/test/simple/test-stream-push-strings.js
-+++ b/test/simple/test-stream-push-strings.js
-@@ -22,7 +22,7 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- var util = require('util');
- 
- util.inherits(MyStream, Readable);
-diff --git a/test/simple/test-stream-readable-event.js b/test/simple/test-stream-readable-event.js
-index ba6a577..a8e6f7b 100644
---- a/test/simple/test-stream-readable-event.js
-+++ b/test/simple/test-stream-readable-event.js
-@@ -22,7 +22,7 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- 
- (function first() {
-   // First test, not reading when the readable is added.
-diff --git a/test/simple/test-stream-readable-flow-recursion.js b/test/simple/test-stream-readable-flow-recursion.js
-index 2891ad6..11689ba 100644
---- a/test/simple/test-stream-readable-flow-recursion.js
-+++ b/test/simple/test-stream-readable-flow-recursion.js
-@@ -27,7 +27,7 @@ var assert = require('assert');
- // more data continuously, but without triggering a nextTick
- // warning or RangeError.
- 
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- 
- // throw an error if we trigger a nextTick warning.
- process.throwDeprecation = true;
-diff --git a/test/simple/test-stream-unshift-empty-chunk.js b/test/simple/test-stream-unshift-empty-chunk.js
-index 0c96476..7827538 100644
---- a/test/simple/test-stream-unshift-empty-chunk.js
-+++ b/test/simple/test-stream-unshift-empty-chunk.js
-@@ -24,7 +24,7 @@ var assert = require('assert');
- 
- // This test verifies that stream.unshift(Buffer(0)) or 
- // stream.unshift('') does not set state.reading=false.
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- 
- var r = new Readable();
- var nChunks = 10;
-diff --git a/test/simple/test-stream-unshift-read-race.js b/test/simple/test-stream-unshift-read-race.js
-index 83fd9fa..17c18aa 100644
---- a/test/simple/test-stream-unshift-read-race.js
-+++ b/test/simple/test-stream-unshift-read-race.js
-@@ -29,7 +29,7 @@ var assert = require('assert');
- // 3. push() after the EOF signaling null is an error.
- // 4. _read() is not called after pushing the EOF null chunk.
- 
--var stream = require('stream');
-+var stream = require('../../');
- var hwm = 10;
- var r = stream.Readable({ highWaterMark: hwm });
- var chunks = 10;
-@@ -51,7 +51,14 @@ r._read = function(n) {
- 
-   function push(fast) {
-     assert(!pushedNull, 'push() after null push');
--    var c = pos >= data.length ? null : data.slice(pos, pos + n);
-+    var c;
-+    if (pos >= data.length)
-+      c = null;
-+    else {
-+      if (n + pos > data.length)
-+        n = data.length - pos;
-+      c = data.slice(pos, pos + n);
-+    }
-     pushedNull = c === null;
-     if (fast) {
-       pos += n;
-diff --git a/test/simple/test-stream-writev.js b/test/simple/test-stream-writev.js
-index 5b49e6e..b5321f3 100644
---- a/test/simple/test-stream-writev.js
-+++ b/test/simple/test-stream-writev.js
-@@ -22,7 +22,7 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var stream = require('stream');
-+var stream = require('../../');
- 
- var queue = [];
- for (var decode = 0; decode < 2; decode++) {
-diff --git a/test/simple/test-stream2-basic.js b/test/simple/test-stream2-basic.js
-index 3814bf0..248c1be 100644
---- a/test/simple/test-stream2-basic.js
-+++ b/test/simple/test-stream2-basic.js
-@@ -21,7 +21,7 @@
- 
- 
- var common = require('../common.js');
--var R = require('_stream_readable');
-+var R = require('../../lib/_stream_readable');
- var assert = require('assert');
- 
- var util = require('util');
-diff --git a/test/simple/test-stream2-compatibility.js b/test/simple/test-stream2-compatibility.js
-index 6cdd4e9..f0fa84b 100644
---- a/test/simple/test-stream2-compatibility.js
-+++ b/test/simple/test-stream2-compatibility.js
-@@ -21,7 +21,7 @@
- 
- 
- var common = require('../common.js');
--var R = require('_stream_readable');
-+var R = require('../../lib/_stream_readable');
- var assert = require('assert');
- 
- var util = require('util');
-diff --git a/test/simple/test-stream2-finish-pipe.js b/test/simple/test-stream2-finish-pipe.js
-index 39b274f..006a19b 100644
---- a/test/simple/test-stream2-finish-pipe.js
-+++ b/test/simple/test-stream2-finish-pipe.js
-@@ -20,7 +20,7 @@
- // USE OR OTHER DEALINGS IN THE SOFTWARE.
- 
- var common = require('../common.js');
--var stream = require('stream');
-+var stream = require('../../');
- var Buffer = require('buffer').Buffer;
- 
- var r = new stream.Readable();
-diff --git a/test/simple/test-stream2-fs.js b/test/simple/test-stream2-fs.js
-deleted file mode 100644
-index e162406..0000000
---- a/test/simple/test-stream2-fs.js
-+++ /dev/null
-@@ -1,72 +0,0 @@
--// Copyright Joyent, Inc. and other Node contributors.
--//
--// Permission is hereby granted, free of charge, to any person obtaining a
--// copy of this software and associated documentation files (the
--// "Software"), to deal in the Software without restriction, including
--// without limitation the rights to use, copy, modify, merge, publish,
--// distribute, sublicense, and/or sell copies of the Software, and to permit
--// persons to whom the Software is furnished to do so, subject to the
--// following conditions:
--//
--// The above copyright notice and this permission notice shall be included
--// in all copies or substantial portions of the Software.
--//
--// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
--// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
--// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
--// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
--// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
--// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
--// USE OR OTHER DEALINGS IN THE SOFTWARE.
--
--
--var common = require('../common.js');
--var R = require('_stream_readable');
--var assert = require('assert');
--
--var fs = require('fs');
--var FSReadable = fs.ReadStream;
--
--var path = require('path');
--var file = path.resolve(common.fixturesDir, 'x1024.txt');
--
--var size = fs.statSync(file).size;
--
--var expectLengths = [1024];
--
--var util = require('util');
--var Stream = require('stream');
--
--util.inherits(TestWriter, Stream);
--
--function TestWriter() {
--  Stream.apply(this);
--  this.buffer = [];
--  this.length = 0;
--}
--
--TestWriter.prototype.write = function(c) {
--  this.buffer.push(c.toString());
--  this.length += c.length;
--  return true;
--};
--
--TestWriter.prototype.end = function(c) {
--  if (c) this.buffer.push(c.toString());
--  this.emit('results', this.buffer);
--}
--
--var r = new FSReadable(file);
--var w = new TestWriter();
--
--w.on('results', function(res) {
--  console.error(res, w.length);
--  assert.equal(w.length, size);
--  var l = 0;
--  assert.deepEqual(res.map(function (c) {
--    return c.length;
--  }), expectLengths);
--  console.log('ok');
--});
--
--r.pipe(w);
-diff --git a/test/simple/test-stream2-httpclient-response-end.js b/test/simple/test-stream2-httpclient-response-end.js
-deleted file mode 100644
-index 15cffc2..0000000
---- a/test/simple/test-stream2-httpclient-response-end.js
-+++ /dev/null
-@@ -1,52 +0,0 @@
--// Copyright Joyent, Inc. and other Node contributors.
--//
--// Permission is hereby granted, free of charge, to any person obtaining a
--// copy of this software and associated documentation files (the
--// "Software"), to deal in the Software without restriction, including
--// without limitation the rights to use, copy, modify, merge, publish,
--// distribute, sublicense, and/or sell copies of the Software, and to permit
--// persons to whom the Software is furnished to do so, subject to the
--// following conditions:
--//
--// The above copyright notice and this permission notice shall be included
--// in all copies or substantial portions of the Software.
--//
--// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
--// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
--// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
--// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
--// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
--// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
--// USE OR OTHER DEALINGS IN THE SOFTWARE.
--
--var common = require('../common.js');
--var assert = require('assert');
--var http = require('http');
--var msg = 'Hello';
--var readable_event = false;
--var end_event = false;
--var server = http.createServer(function(req, res) {
--  res.writeHead(200, {'Content-Type': 'text/plain'});
--  res.end(msg);
--}).listen(common.PORT, function() {
--  http.get({port: common.PORT}, function(res) {
--    var data = '';
--    res.on('readable', function() {
--      console.log('readable event');
--      readable_event = true;
--      data += res.read();
--    });
--    res.on('end', function() {
--      console.log('end event');
--      end_event = true;
--      assert.strictEqual(msg, data);
--      server.close();
--    });
--  });
--});
--
--process.on('exit', function() {
--  assert(readable_event);
--  assert(end_event);
--});
--
-diff --git a/test/simple/test-stream2-large-read-stall.js b/test/simple/test-stream2-large-read-stall.js
-index 2fbfbca..667985b 100644
---- a/test/simple/test-stream2-large-read-stall.js
-+++ b/test/simple/test-stream2-large-read-stall.js
-@@ -30,7 +30,7 @@ var PUSHSIZE = 20;
- var PUSHCOUNT = 1000;
- var HWM = 50;
- 
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- var r = new Readable({
-   highWaterMark: HWM
- });
-@@ -39,23 +39,23 @@ var rs = r._readableState;
- r._read = push;
- 
- r.on('readable', function() {
--  console.error('>> readable');
-+  //console.error('>> readable');
-   do {
--    console.error('  > read(%d)', READSIZE);
-+    //console.error('  > read(%d)', READSIZE);
-     var ret = r.read(READSIZE);
--    console.error('  < %j (%d remain)', ret && ret.length, rs.length);
-+    //console.error('  < %j (%d remain)', ret && ret.length, rs.length);
-   } while (ret && ret.length === READSIZE);
- 
--  console.error('<< after read()',
--                ret && ret.length,
--                rs.needReadable,
--                rs.length);
-+  //console.error('<< after read()',
-+  //              ret && ret.length,
-+  //              rs.needReadable,
-+  //              rs.length);
- });
- 
- var endEmitted = false;
- r.on('end', function() {
-   endEmitted = true;
--  console.error('end');
-+  //console.error('end');
- });
- 
- var pushes = 0;
-@@ -64,11 +64,11 @@ function push() {
-     return;
- 
-   if (pushes++ === PUSHCOUNT) {
--    console.error('   push(EOF)');
-+    //console.error('   push(EOF)');
-     return r.push(null);
-   }
- 
--  console.error('   push #%d', pushes);
-+  //console.error('   push #%d', pushes);
-   if (r.push(new Buffer(PUSHSIZE)))
-     setTimeout(push);
- }
-diff --git a/test/simple/test-stream2-objects.js b/test/simple/test-stream2-objects.js
-index 3e6931d..ff47d89 100644
---- a/test/simple/test-stream2-objects.js
-+++ b/test/simple/test-stream2-objects.js
-@@ -21,8 +21,8 @@
- 
- 
- var common = require('../common.js');
--var Readable = require('_stream_readable');
--var Writable = require('_stream_writable');
-+var Readable = require('../../lib/_stream_readable');
-+var Writable = require('../../lib/_stream_writable');
- var assert = require('assert');
- 
- // tiny node-tap lookalike.
-diff --git a/test/simple/test-stream2-pipe-error-handling.js b/test/simple/test-stream2-pipe-error-handling.js
-index cf7531c..e3f3e4e 100644
---- a/test/simple/test-stream2-pipe-error-handling.js
-+++ b/test/simple/test-stream2-pipe-error-handling.js
-@@ -21,7 +21,7 @@
- 
- var common = require('../common');
- var assert = require('assert');
--var stream = require('stream');
-+var stream = require('../../');
- 
- (function testErrorListenerCatches() {
-   var count = 1000;
-diff --git a/test/simple/test-stream2-pipe-error-once-listener.js b/test/simple/test-stream2-pipe-error-once-listener.js
-index 5e8e3cb..53b2616 100755
---- a/test/simple/test-stream2-pipe-error-once-listener.js
-+++ b/test/simple/test-stream2-pipe-error-once-listener.js
-@@ -24,7 +24,7 @@ var common = require('../common.js');
- var assert = require('assert');
- 
- var util = require('util');
--var stream = require('stream');
-+var stream = require('../../');
- 
- 
- var Read = function() {
-diff --git a/test/simple/test-stream2-push.js b/test/simple/test-stream2-push.js
-index b63edc3..eb2b0e9 100644
---- a/test/simple/test-stream2-push.js
-+++ b/test/simple/test-stream2-push.js
-@@ -20,7 +20,7 @@
- // USE OR OTHER DEALINGS IN THE SOFTWARE.
- 
- var common = require('../common.js');
--var stream = require('stream');
-+var stream = require('../../');
- var Readable = stream.Readable;
- var Writable = stream.Writable;
- var assert = require('assert');
-diff --git a/test/simple/test-stream2-read-sync-stack.js b/test/simple/test-stream2-read-sync-stack.js
-index e8a7305..9740a47 100644
---- a/test/simple/test-stream2-read-sync-stack.js
-+++ b/test/simple/test-stream2-read-sync-stack.js
-@@ -21,7 +21,7 @@
- 
- var common = require('../common');
- var assert = require('assert');
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- var r = new Readable();
- var N = 256 * 1024;
- 
-diff --git a/test/simple/test-stream2-readable-empty-buffer-no-eof.js b/test/simple/test-stream2-readable-empty-buffer-no-eof.js
-index cd30178..4b1659d 100644
---- a/test/simple/test-stream2-readable-empty-buffer-no-eof.js
-+++ b/test/simple/test-stream2-readable-empty-buffer-no-eof.js
-@@ -22,10 +22,9 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var Readable = require('stream').Readable;
-+var Readable = require('../../').Readable;
- 
- test1();
--test2();
- 
- function test1() {
-   var r = new Readable();
-@@ -88,31 +87,3 @@ function test1() {
-     console.log('ok');
-   });
- }
--
--function test2() {
--  var r = new Readable({ encoding: 'base64' });
--  var reads = 5;
--  r._read = function(n) {
--    if (!reads--)
--      return r.push(null); // EOF
--    else
--      return r.push(new Buffer('x'));
--  };
--
--  var results = [];
--  function flow() {
--    var chunk;
--    while (null !== (chunk = r.read()))
--      results.push(chunk + '');
--  }
--  r.on('readable', flow);
--  r.on('end', function() {
--    results.push('EOF');
--  });
--  flow();
--
--  process.on('exit', function() {
--    assert.deepEqual(results, [ 'eHh4', 'eHg=', 'EOF' ]);
--    console.log('ok');
--  });
--}
-diff --git a/test/simple/test-stream2-readable-from-list.js b/test/simple/test-stream2-readable-from-list.js
-index 7c96ffe..04a96f5 100644
---- a/test/simple/test-stream2-readable-from-list.js
-+++ b/test/simple/test-stream2-readable-from-list.js
-@@ -21,7 +21,7 @@
- 
- var assert = require('assert');
- var common = require('../common.js');
--var fromList = require('_stream_readable')._fromList;
-+var fromList = require('../../lib/_stream_readable')._fromList;
- 
- // tiny node-tap lookalike.
- var tests = [];
-diff --git a/test/simple/test-stream2-readable-legacy-drain.js b/test/simple/test-stream2-readable-legacy-drain.js
-index 675da8e..51fd3d5 100644
---- a/test/simple/test-stream2-readable-legacy-drain.js
-+++ b/test/simple/test-stream2-readable-legacy-drain.js
-@@ -22,7 +22,7 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var Stream = require('stream');
-+var Stream = require('../../');
- var Readable = Stream.Readable;
- 
- var r = new Readable();
-diff --git a/test/simple/test-stream2-readable-non-empty-end.js b/test/simple/test-stream2-readable-non-empty-end.js
-index 7314ae7..c971898 100644
---- a/test/simple/test-stream2-readable-non-empty-end.js
-+++ b/test/simple/test-stream2-readable-non-empty-end.js
-@@ -21,7 +21,7 @@
- 
- var assert = require('assert');
- var common = require('../common.js');
--var Readable = require('_stream_readable');
-+var Readable = require('../../lib/_stream_readable');
- 
- var len = 0;
- var chunks = new Array(10);
-diff --git a/test/simple/test-stream2-readable-wrap-empty.js b/test/simple/test-stream2-readable-wrap-empty.js
-index 2e5cf25..fd8a3dc 100644
---- a/test/simple/test-stream2-readable-wrap-empty.js
-+++ b/test/simple/test-stream2-readable-wrap-empty.js
-@@ -22,7 +22,7 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var Readable = require('_stream_readable');
-+var Readable = require('../../lib/_stream_readable');
- var EE = require('events').EventEmitter;
- 
- var oldStream = new EE();
-diff --git a/test/simple/test-stream2-readable-wrap.js b/test/simple/test-stream2-readable-wrap.js
-index 90eea01..6b177f7 100644
---- a/test/simple/test-stream2-readable-wrap.js
-+++ b/test/simple/test-stream2-readable-wrap.js
-@@ -22,8 +22,8 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var Readable = require('_stream_readable');
--var Writable = require('_stream_writable');
-+var Readable = require('../../lib/_stream_readable');
-+var Writable = require('../../lib/_stream_writable');
- var EE = require('events').EventEmitter;
- 
- var testRuns = 0, completedRuns = 0;
-diff --git a/test/simple/test-stream2-set-encoding.js b/test/simple/test-stream2-set-encoding.js
-index 5d2c32a..685531b 100644
---- a/test/simple/test-stream2-set-encoding.js
-+++ b/test/simple/test-stream2-set-encoding.js
-@@ -22,7 +22,7 @@
- 
- var common = require('../common.js');
- var assert = require('assert');
--var R = require('_stream_readable');
-+var R = require('../../lib/_stream_readable');
- var util = require('util');
- 
- // tiny node-tap lookalike.
-diff --git a/test/simple/test-stream2-transform.js b/test/simple/test-stream2-transform.js
-index 9c9ddd8..a0cacc6 100644
---- a/test/simple/test-stream2-transform.js
-+++ b/test/simple/test-stream2-transform.js
-@@ -21,8 +21,8 @@
- 
- var assert = require('assert');
- var common = require('../common.js');
--var PassThrough = require('_stream_passthrough');
--var Transform = require('_stream_transform');
-+var PassThrough = require('../../').PassThrough;
-+var Transform = require('../../').Transform;
- 
- // tiny node-tap lookalike.
- var tests = [];
-diff --git a/test/simple/test-stream2-unpipe-drain.js b/test/simple/test-stream2-unpipe-drain.js
-index d66dc3c..365b327 100644
---- a/test/simple/test-stream2-unpipe-drain.js
-+++ b/test/simple/test-stream2-unpipe-drain.js
-@@ -22,7 +22,7 @@
- 
- var common = require('../common.js');
- var assert = require('assert');
--var stream = require('stream');
-+var stream = require('../../');
- var crypto = require('crypto');
- 
- var util = require('util');
-diff --git a/test/simple/test-stream2-unpipe-leak.js b/test/simple/test-stream2-unpipe-leak.js
-index 99f8746..17c92ae 100644
---- a/test/simple/test-stream2-unpipe-leak.js
-+++ b/test/simple/test-stream2-unpipe-leak.js
-@@ -22,7 +22,7 @@
- 
- var common = require('../common.js');
- var assert = require('assert');
--var stream = require('stream');
-+var stream = require('../../');
- 
- var chunk = new Buffer('hallo');
- 
-diff --git a/test/simple/test-stream2-writable.js b/test/simple/test-stream2-writable.js
-index 704100c..209c3a6 100644
---- a/test/simple/test-stream2-writable.js
-+++ b/test/simple/test-stream2-writable.js
-@@ -20,8 +20,8 @@
- // USE OR OTHER DEALINGS IN THE SOFTWARE.
- 
- var common = require('../common.js');
--var W = require('_stream_writable');
--var D = require('_stream_duplex');
-+var W = require('../../').Writable;
-+var D = require('../../').Duplex;
- var assert = require('assert');
- 
- var util = require('util');
-diff --git a/test/simple/test-stream3-pause-then-read.js b/test/simple/test-stream3-pause-then-read.js
-index b91bde3..2f72c15 100644
---- a/test/simple/test-stream3-pause-then-read.js
-+++ b/test/simple/test-stream3-pause-then-read.js
-@@ -22,7 +22,7 @@
- var common = require('../common');
- var assert = require('assert');
- 
--var stream = require('stream');
-+var stream = require('../../');
- var Readable = stream.Readable;
- var Writable = stream.Writable;
- 
diff --git a/node_modules/readable-stream/lib/_stream_duplex.js b/node_modules/readable-stream/lib/_stream_duplex.js
index b513d61a9..736693b84 100644
--- a/node_modules/readable-stream/lib/_stream_duplex.js
+++ b/node_modules/readable-stream/lib/_stream_duplex.js
@@ -1,39 +1,25 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
 // a duplex stream is just a stream that is both readable and writable.
 // Since JS doesn't have multiple prototypal inheritance, this class
 // prototypally inherits from Readable, and then parasitically from
 // Writable.
 
-module.exports = Duplex;
+'use strict';
 
 /*<replacement>*/
+
 var objectKeys = Object.keys || function (obj) {
   var keys = [];
-  for (var key in obj) keys.push(key);
-  return keys;
-}
+  for (var key in obj) {
+    keys.push(key);
+  }return keys;
+};
 /*</replacement>*/
 
+module.exports = Duplex;
+
+/*<replacement>*/
+var processNextTick = require('process-nextick-args');
+/*</replacement>*/
 
 /*<replacement>*/
 var util = require('core-util-is');
@@ -45,27 +31,24 @@ var Writable = require('./_stream_writable');
 
 util.inherits(Duplex, Readable);
 
-forEach(objectKeys(Writable.prototype), function(method) {
-  if (!Duplex.prototype[method])
-    Duplex.prototype[method] = Writable.prototype[method];
-});
+var keys = objectKeys(Writable.prototype);
+for (var v = 0; v < keys.length; v++) {
+  var method = keys[v];
+  if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
+}
 
 function Duplex(options) {
-  if (!(this instanceof Duplex))
-    return new Duplex(options);
+  if (!(this instanceof Duplex)) return new Duplex(options);
 
   Readable.call(this, options);
   Writable.call(this, options);
 
-  if (options && options.readable === false)
-    this.readable = false;
+  if (options && options.readable === false) this.readable = false;
 
-  if (options && options.writable === false)
-    this.writable = false;
+  if (options && options.writable === false) this.writable = false;
 
   this.allowHalfOpen = true;
-  if (options && options.allowHalfOpen === false)
-    this.allowHalfOpen = false;
+  if (options && options.allowHalfOpen === false) this.allowHalfOpen = false;
 
   this.once('end', onend);
 }
@@ -74,16 +57,19 @@ function Duplex(options) {
 function onend() {
   // if we allow half-open state, or if the writable side ended,
   // then we're ok.
-  if (this.allowHalfOpen || this._writableState.ended)
-    return;
+  if (this.allowHalfOpen || this._writableState.ended) return;
 
   // no more data can be written.
   // But allow more writes to happen in this tick.
-  process.nextTick(this.end.bind(this));
+  processNextTick(onEndNT, this);
 }
 
-function forEach (xs, f) {
+function onEndNT(self) {
+  self.end();
+}
+
+function forEach(xs, f) {
   for (var i = 0, l = xs.length; i < l; i++) {
     f(xs[i], i);
   }
-}
+}
\ No newline at end of file
diff --git a/node_modules/readable-stream/lib/_stream_passthrough.js b/node_modules/readable-stream/lib/_stream_passthrough.js
index 895ca50a1..d06f71f18 100644
--- a/node_modules/readable-stream/lib/_stream_passthrough.js
+++ b/node_modules/readable-stream/lib/_stream_passthrough.js
@@ -1,28 +1,9 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
 // a passthrough stream.
 // basically just the most minimal sort of Transform stream.
 // Every written chunk gets output as-is.
 
+'use strict';
+
 module.exports = PassThrough;
 
 var Transform = require('./_stream_transform');
@@ -35,12 +16,11 @@ util.inherits = require('inherits');
 util.inherits(PassThrough, Transform);
 
 function PassThrough(options) {
-  if (!(this instanceof PassThrough))
-    return new PassThrough(options);
+  if (!(this instanceof PassThrough)) return new PassThrough(options);
 
   Transform.call(this, options);
 }
 
-PassThrough.prototype._transform = function(chunk, encoding, cb) {
+PassThrough.prototype._transform = function (chunk, encoding, cb) {
   cb(null, chunk);
-};
+};
\ No newline at end of file
diff --git a/node_modules/readable-stream/lib/_stream_readable.js b/node_modules/readable-stream/lib/_stream_readable.js
index 19ab35889..208cc65f1 100644
--- a/node_modules/readable-stream/lib/_stream_readable.js
+++ b/node_modules/readable-stream/lib/_stream_readable.js
@@ -1,82 +1,98 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+'use strict';
 
 module.exports = Readable;
 
 /*<replacement>*/
-var isArray = require('isarray');
+var processNextTick = require('process-nextick-args');
 /*</replacement>*/
 
-
 /*<replacement>*/
-var Buffer = require('buffer').Buffer;
+var isArray = require('isarray');
 /*</replacement>*/
 
 Readable.ReadableState = ReadableState;
 
+/*<replacement>*/
 var EE = require('events').EventEmitter;
 
-/*<replacement>*/
-if (!EE.listenerCount) EE.listenerCount = function(emitter, type) {
+var EElistenerCount = function (emitter, type) {
   return emitter.listeners(type).length;
 };
 /*</replacement>*/
 
-var Stream = require('stream');
+/*<replacement>*/
+var Stream;
+(function () {
+  try {
+    Stream = require('st' + 'ream');
+  } catch (_) {} finally {
+    if (!Stream) Stream = require('events').EventEmitter;
+  }
+})();
+/*</replacement>*/
+
+var Buffer = require('buffer').Buffer;
+/*<replacement>*/
+var bufferShim = require('buffer-shims');
+/*</replacement>*/
 
 /*<replacement>*/
 var util = require('core-util-is');
 util.inherits = require('inherits');
 /*</replacement>*/
 
-var StringDecoder;
-
-
 /*<replacement>*/
-var debug = require('util');
-if (debug && debug.debuglog) {
-  debug = debug.debuglog('stream');
+var debugUtil = require('util');
+var debug = void 0;
+if (debugUtil && debugUtil.debuglog) {
+  debug = debugUtil.debuglog('stream');
 } else {
   debug = function () {};
 }
 /*</replacement>*/
 
+var BufferList = require('./internal/streams/BufferList');
+var StringDecoder;
 
 util.inherits(Readable, Stream);
 
+function prependListener(emitter, event, fn) {
+  if (typeof emitter.prependListener === 'function') {
+    return emitter.prependListener(event, fn);
+  } else {
+    // This is a hack to make sure that our error handler is attached before any
+    // userland ones.  NEVER DO THIS. This is here only because this code needs
+    // to continue to work with older versions of Node.js that do not include
+    // the prependListener() method. The goal is to eventually remove this hack.
+    if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
+  }
+}
+
+var Duplex;
 function ReadableState(options, stream) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
   options = options || {};
 
+  // object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away
+  this.objectMode = !!options.objectMode;
+
+  if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.readableObjectMode;
+
   // the point at which it stops calling _read() to fill the buffer
   // Note: 0 is a valid value, means "don't call _read preemptively ever"
   var hwm = options.highWaterMark;
-  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
-  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
+  var defaultHwm = this.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm;
 
   // cast to ints.
-  this.highWaterMark = ~~this.highWaterMark;
+  this.highWaterMark = ~ ~this.highWaterMark;
 
-  this.buffer = [];
+  // A linked list is used to store data chunks instead of an array because the
+  // linked list can remove elements from the beginning faster than
+  // array.shift()
+  this.buffer = new BufferList();
   this.length = 0;
   this.pipes = null;
   this.pipesCount = 0;
@@ -96,14 +112,7 @@ function ReadableState(options, stream) {
   this.needReadable = false;
   this.emittedReadable = false;
   this.readableListening = false;
-
-
-  // object stream flag. Used to make read(n) ignore n and to
-  // make all the buffer merging and length checks go away
-  this.objectMode = !!options.objectMode;
-
-  if (stream instanceof Duplex)
-    this.objectMode = this.objectMode || !!options.readableObjectMode;
+  this.resumeScheduled = false;
 
   // Crypto is kind of old and crusty.  Historically, its default string
   // encoding is 'binary' so we have to make this configurable.
@@ -123,24 +132,25 @@ function ReadableState(options, stream) {
   this.decoder = null;
   this.encoding = null;
   if (options.encoding) {
-    if (!StringDecoder)
-      StringDecoder = require('string_decoder/').StringDecoder;
+    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
     this.decoder = new StringDecoder(options.encoding);
     this.encoding = options.encoding;
   }
 }
 
+var Duplex;
 function Readable(options) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
-  if (!(this instanceof Readable))
-    return new Readable(options);
+  if (!(this instanceof Readable)) return new Readable(options);
 
   this._readableState = new ReadableState(options, this);
 
   // legacy
   this.readable = true;
 
+  if (options && typeof options.read === 'function') this._read = options.read;
+
   Stream.call(this);
 }
 
@@ -148,13 +158,13 @@ function Readable(options) {
 // This returns true if the highWaterMark has not been hit yet,
 // similar to how Writable.write() returns true if you should
 // write() some more.
-Readable.prototype.push = function(chunk, encoding) {
+Readable.prototype.push = function (chunk, encoding) {
   var state = this._readableState;
 
-  if (util.isString(chunk) && !state.objectMode) {
+  if (!state.objectMode && typeof chunk === 'string') {
     encoding = encoding || state.defaultEncoding;
     if (encoding !== state.encoding) {
-      chunk = new Buffer(chunk, encoding);
+      chunk = bufferShim.from(chunk, encoding);
       encoding = '';
     }
   }
@@ -163,47 +173,52 @@ Readable.prototype.push = function(chunk, encoding) {
 };
 
 // Unshift should *always* be something directly out of read()
-Readable.prototype.unshift = function(chunk) {
+Readable.prototype.unshift = function (chunk) {
   var state = this._readableState;
   return readableAddChunk(this, state, chunk, '', true);
 };
 
+Readable.prototype.isPaused = function () {
+  return this._readableState.flowing === false;
+};
+
 function readableAddChunk(stream, state, chunk, encoding, addToFront) {
   var er = chunkInvalid(state, chunk);
   if (er) {
     stream.emit('error', er);
-  } else if (util.isNullOrUndefined(chunk)) {
+  } else if (chunk === null) {
     state.reading = false;
-    if (!state.ended)
-      onEofChunk(stream, state);
+    onEofChunk(stream, state);
   } else if (state.objectMode || chunk && chunk.length > 0) {
     if (state.ended && !addToFront) {
       var e = new Error('stream.push() after EOF');
       stream.emit('error', e);
     } else if (state.endEmitted && addToFront) {
-      var e = new Error('stream.unshift() after end event');
-      stream.emit('error', e);
+      var _e = new Error('stream.unshift() after end event');
+      stream.emit('error', _e);
     } else {
-      if (state.decoder && !addToFront && !encoding)
+      var skipAdd;
+      if (state.decoder && !addToFront && !encoding) {
         chunk = state.decoder.write(chunk);
+        skipAdd = !state.objectMode && chunk.length === 0;
+      }
 
-      if (!addToFront)
-        state.reading = false;
-
-      // if we want the data now, just emit it.
-      if (state.flowing && state.length === 0 && !state.sync) {
-        stream.emit('data', chunk);
-        stream.read(0);
-      } else {
-        // update the buffer info.
-        state.length += state.objectMode ? 1 : chunk.length;
-        if (addToFront)
-          state.buffer.unshift(chunk);
-        else
-          state.buffer.push(chunk);
-
-        if (state.needReadable)
-          emitReadable(stream);
+      if (!addToFront) state.reading = false;
+
+      // Don't add to the buffer if we've decoded to an empty string chunk and
+      // we're not in object mode
+      if (!skipAdd) {
+        // if we want the data now, just emit it.
+        if (state.flowing && state.length === 0 && !state.sync) {
+          stream.emit('data', chunk);
+          stream.read(0);
+        } else {
+          // update the buffer info.
+          state.length += state.objectMode ? 1 : chunk.length;
+          if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
+
+          if (state.needReadable) emitReadable(stream);
+        }
       }
 
       maybeReadMore(stream, state);
@@ -215,8 +230,6 @@ function readableAddChunk(stream, state, chunk, encoding, addToFront) {
   return needMoreData(state);
 }
 
-
-
 // if it's past the high water mark, we can push in some more.
 // Also, if we have no data yet, we can stand some
 // more bytes.  This is to work around cases where hwm=0,
@@ -225,92 +238,71 @@ function readableAddChunk(stream, state, chunk, encoding, addToFront) {
 // needReadable was set, then we ought to push more, so that another
 // 'readable' event will be triggered.
 function needMoreData(state) {
-  return !state.ended &&
-         (state.needReadable ||
-          state.length < state.highWaterMark ||
-          state.length === 0);
+  return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0);
 }
 
 // backwards compatibility.
-Readable.prototype.setEncoding = function(enc) {
-  if (!StringDecoder)
-    StringDecoder = require('string_decoder/').StringDecoder;
+Readable.prototype.setEncoding = function (enc) {
+  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
   this._readableState.decoder = new StringDecoder(enc);
   this._readableState.encoding = enc;
   return this;
 };
 
-// Don't raise the hwm > 128MB
+// Don't raise the hwm > 8MB
 var MAX_HWM = 0x800000;
-function roundUpToNextPowerOf2(n) {
+function computeNewHighWaterMark(n) {
   if (n >= MAX_HWM) {
     n = MAX_HWM;
   } else {
-    // Get the next highest power of 2
+    // Get the next highest power of 2 to prevent increasing hwm excessively in
+    // tiny amounts
     n--;
-    for (var p = 1; p < 32; p <<= 1) n |= n >> p;
+    n |= n >>> 1;
+    n |= n >>> 2;
+    n |= n >>> 4;
+    n |= n >>> 8;
+    n |= n >>> 16;
     n++;
   }
   return n;
 }
 
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
 function howMuchToRead(n, state) {
-  if (state.length === 0 && state.ended)
+  if (n <= 0 || state.length === 0 && state.ended) return 0;
+  if (state.objectMode) return 1;
+  if (n !== n) {
+    // Only flow one buffer at a time
+    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
+  }
+  // If we're asking for more than the current hwm, then raise the hwm.
+  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
+  if (n <= state.length) return n;
+  // Don't have enough
+  if (!state.ended) {
+    state.needReadable = true;
     return 0;
-
-  if (state.objectMode)
-    return n === 0 ? 0 : 1;
-
-  if (isNaN(n) || util.isNull(n)) {
-    // only flow one buffer at a time
-    if (state.flowing && state.buffer.length)
-      return state.buffer[0].length;
-    else
-      return state.length;
   }
-
-  if (n <= 0)
-    return 0;
-
-  // If we're asking for more than the target buffer level,
-  // then raise the water mark.  Bump up to the next highest
-  // power of 2, to prevent increasing it excessively in tiny
-  // amounts.
-  if (n > state.highWaterMark)
-    state.highWaterMark = roundUpToNextPowerOf2(n);
-
-  // don't have that much.  return null, unless we've ended.
-  if (n > state.length) {
-    if (!state.ended) {
-      state.needReadable = true;
-      return 0;
-    } else
-      return state.length;
-  }
-
-  return n;
+  return state.length;
 }
 
 // you can override either this method, or the async _read(n) below.
-Readable.prototype.read = function(n) {
+Readable.prototype.read = function (n) {
   debug('read', n);
+  n = parseInt(n, 10);
   var state = this._readableState;
   var nOrig = n;
 
-  if (!util.isNumber(n) || n > 0)
-    state.emittedReadable = false;
+  if (n !== 0) state.emittedReadable = false;
 
   // if we're doing read(0) to trigger a readable event, but we
   // already have a bunch of data in the buffer, then just trigger
   // the 'readable' event and move on.
-  if (n === 0 &&
-      state.needReadable &&
-      (state.length >= state.highWaterMark || state.ended)) {
+  if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) {
     debug('read: emitReadable', state.length, state.ended);
-    if (state.length === 0 && state.ended)
-      endReadable(this);
-    else
-      emitReadable(this);
+    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
     return null;
   }
 
@@ -318,8 +310,7 @@ Readable.prototype.read = function(n) {
 
   // if we've ended, and we're now clear, then finish it up.
   if (n === 0 && state.ended) {
-    if (state.length === 0)
-      endReadable(this);
+    if (state.length === 0) endReadable(this);
     return null;
   }
 
@@ -360,67 +351,55 @@ Readable.prototype.read = function(n) {
   if (state.ended || state.reading) {
     doRead = false;
     debug('reading or ended', doRead);
-  }
-
-  if (doRead) {
+  } else if (doRead) {
     debug('do read');
     state.reading = true;
     state.sync = true;
     // if the length is currently zero, then we *need* a readable event.
-    if (state.length === 0)
-      state.needReadable = true;
+    if (state.length === 0) state.needReadable = true;
     // call internal read method
     this._read(state.highWaterMark);
     state.sync = false;
+    // If _read pushed data synchronously, then `reading` will be false,
+    // and we need to re-evaluate how much data we can return to the user.
+    if (!state.reading) n = howMuchToRead(nOrig, state);
   }
 
-  // If _read pushed data synchronously, then `reading` will be false,
-  // and we need to re-evaluate how much data we can return to the user.
-  if (doRead && !state.reading)
-    n = howMuchToRead(nOrig, state);
-
   var ret;
-  if (n > 0)
-    ret = fromList(n, state);
-  else
-    ret = null;
+  if (n > 0) ret = fromList(n, state);else ret = null;
 
-  if (util.isNull(ret)) {
+  if (ret === null) {
     state.needReadable = true;
     n = 0;
+  } else {
+    state.length -= n;
   }
 
-  state.length -= n;
-
-  // If we have nothing in the buffer, then we want to know
-  // as soon as we *do* get something into the buffer.
-  if (state.length === 0 && !state.ended)
-    state.needReadable = true;
+  if (state.length === 0) {
+    // If we have nothing in the buffer, then we want to know
+    // as soon as we *do* get something into the buffer.
+    if (!state.ended) state.needReadable = true;
 
-  // If we tried to read() past the EOF, then emit end on the next tick.
-  if (nOrig !== n && state.ended && state.length === 0)
-    endReadable(this);
+    // If we tried to read() past the EOF, then emit end on the next tick.
+    if (nOrig !== n && state.ended) endReadable(this);
+  }
 
-  if (!util.isNull(ret))
-    this.emit('data', ret);
+  if (ret !== null) this.emit('data', ret);
 
   return ret;
 };
 
 function chunkInvalid(state, chunk) {
   var er = null;
-  if (!util.isBuffer(chunk) &&
-      !util.isString(chunk) &&
-      !util.isNullOrUndefined(chunk) &&
-      !state.objectMode) {
+  if (!Buffer.isBuffer(chunk) && typeof chunk !== 'string' && chunk !== null && chunk !== undefined && !state.objectMode) {
     er = new TypeError('Invalid non-string/buffer chunk');
   }
   return er;
 }
 
-
 function onEofChunk(stream, state) {
-  if (state.decoder && !state.ended) {
+  if (state.ended) return;
+  if (state.decoder) {
     var chunk = state.decoder.end();
     if (chunk && chunk.length) {
       state.buffer.push(chunk);
@@ -442,12 +421,7 @@ function emitReadable(stream) {
   if (!state.emittedReadable) {
     debug('emitReadable', state.flowing);
     state.emittedReadable = true;
-    if (state.sync)
-      process.nextTick(function() {
-        emitReadable_(stream);
-      });
-    else
-      emitReadable_(stream);
+    if (state.sync) processNextTick(emitReadable_, stream);else emitReadable_(stream);
   }
 }
 
@@ -457,7 +431,6 @@ function emitReadable_(stream) {
   flow(stream);
 }
 
-
 // at this point, the user has presumably seen the 'readable' event,
 // and called read() to consume some data.  that may have triggered
 // in turn another _read(n) call, in which case reading = true if
@@ -467,23 +440,18 @@ function emitReadable_(stream) {
 function maybeReadMore(stream, state) {
   if (!state.readingMore) {
     state.readingMore = true;
-    process.nextTick(function() {
-      maybeReadMore_(stream, state);
-    });
+    processNextTick(maybeReadMore_, stream, state);
   }
 }
 
 function maybeReadMore_(stream, state) {
   var len = state.length;
-  while (!state.reading && !state.flowing && !state.ended &&
-         state.length < state.highWaterMark) {
+  while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) {
     debug('maybeReadMore read 0');
     stream.read(0);
     if (len === state.length)
       // didn't get any data, stop spinning.
-      break;
-    else
-      len = state.length;
+      break;else len = state.length;
   }
   state.readingMore = false;
 }
@@ -492,11 +460,11 @@ function maybeReadMore_(stream, state) {
 // call cb(er, data) where data is <= n in length.
 // for virtual (non-string, non-buffer) streams, "length" is somewhat
 // arbitrary, and perhaps not very meaningful.
-Readable.prototype._read = function(n) {
+Readable.prototype._read = function (n) {
   this.emit('error', new Error('not implemented'));
 };
 
-Readable.prototype.pipe = function(dest, pipeOpts) {
+Readable.prototype.pipe = function (dest, pipeOpts) {
   var src = this;
   var state = this._readableState;
 
@@ -514,15 +482,10 @@ Readable.prototype.pipe = function(dest, pipeOpts) {
   state.pipesCount += 1;
   debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
 
-  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&
-              dest !== process.stdout &&
-              dest !== process.stderr;
+  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
 
   var endFn = doEnd ? onend : cleanup;
-  if (state.endEmitted)
-    process.nextTick(endFn);
-  else
-    src.once('end', endFn);
+  if (state.endEmitted) processNextTick(endFn);else src.once('end', endFn);
 
   dest.on('unpipe', onunpipe);
   function onunpipe(readable) {
@@ -544,6 +507,7 @@ Readable.prototype.pipe = function(dest, pipeOpts) {
   var ondrain = pipeOnDrain(src);
   dest.on('drain', ondrain);
 
+  var cleanedUp = false;
   function cleanup() {
     debug('cleanup');
     // cleanup event handlers once the pipe is broken
@@ -556,24 +520,36 @@ Readable.prototype.pipe = function(dest, pipeOpts) {
     src.removeListener('end', cleanup);
     src.removeListener('data', ondata);
 
+    cleanedUp = true;
+
     // if the reader is waiting for a drain event from this
     // specific writer, then it would cause it to never start
     // flowing again.
     // So, if this is awaiting a drain, then we just call it now.
     // If we don't know, then assume that we are waiting for one.
-    if (state.awaitDrain &&
-        (!dest._writableState || dest._writableState.needDrain))
-      ondrain();
+    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
   }
 
+  // If the user pushes more data while we're writing to dest then we'll end up
+  // in ondata again. However, we only want to increase awaitDrain once because
+  // dest will only emit one 'drain' event for the multiple writes.
+  // => Introduce a guard on increasing awaitDrain.
+  var increasedAwaitDrain = false;
   src.on('data', ondata);
   function ondata(chunk) {
     debug('ondata');
+    increasedAwaitDrain = false;
     var ret = dest.write(chunk);
-    if (false === ret) {
-      debug('false write response, pause',
-            src._readableState.awaitDrain);
-      src._readableState.awaitDrain++;
+    if (false === ret && !increasedAwaitDrain) {
+      // If the user unpiped during `dest.write()`, it is possible
+      // to get stuck in a permanently paused state if that write
+      // also returned false.
+      // => Check whether `dest` is still a piping destination.
+      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
+        debug('false write response, pause', src._readableState.awaitDrain);
+        src._readableState.awaitDrain++;
+        increasedAwaitDrain = true;
+      }
       src.pause();
     }
   }
@@ -584,19 +560,11 @@ Readable.prototype.pipe = function(dest, pipeOpts) {
     debug('onerror', er);
     unpipe();
     dest.removeListener('error', onerror);
-    if (EE.listenerCount(dest, 'error') === 0)
-      dest.emit('error', er);
+    if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);
   }
-  // This is a brutally ugly hack to make sure that our error handler
-  // is attached before any userland ones.  NEVER DO THIS.
-  if (!dest._events || !dest._events.error)
-    dest.on('error', onerror);
-  else if (isArray(dest._events.error))
-    dest._events.error.unshift(onerror);
-  else
-    dest._events.error = [onerror, dest._events.error];
-
 
+  // Make sure our error handler is attached before userland ones.
+  prependListener(dest, 'error', onerror);
 
   // Both close and finish should trigger unpipe, but only once.
   function onclose() {
@@ -629,41 +597,35 @@ Readable.prototype.pipe = function(dest, pipeOpts) {
 };
 
 function pipeOnDrain(src) {
-  return function() {
+  return function () {
     var state = src._readableState;
     debug('pipeOnDrain', state.awaitDrain);
-    if (state.awaitDrain)
-      state.awaitDrain--;
-    if (state.awaitDrain === 0 && EE.listenerCount(src, 'data')) {
+    if (state.awaitDrain) state.awaitDrain--;
+    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
       state.flowing = true;
       flow(src);
     }
   };
 }
 
-
-Readable.prototype.unpipe = function(dest) {
+Readable.prototype.unpipe = function (dest) {
   var state = this._readableState;
 
   // if we're not piping anywhere, then do nothing.
-  if (state.pipesCount === 0)
-    return this;
+  if (state.pipesCount === 0) return this;
 
   // just one destination.  most common case.
   if (state.pipesCount === 1) {
     // passed in one, but it's not the right one.
-    if (dest && dest !== state.pipes)
-      return this;
+    if (dest && dest !== state.pipes) return this;
 
-    if (!dest)
-      dest = state.pipes;
+    if (!dest) dest = state.pipes;
 
     // got a match.
     state.pipes = null;
     state.pipesCount = 0;
     state.flowing = false;
-    if (dest)
-      dest.emit('unpipe', this);
+    if (dest) dest.emit('unpipe', this);
     return this;
   }
 
@@ -677,20 +639,18 @@ Readable.prototype.unpipe = function(dest) {
     state.pipesCount = 0;
     state.flowing = false;
 
-    for (var i = 0; i < len; i++)
-      dests[i].emit('unpipe', this);
-    return this;
+    for (var _i = 0; _i < len; _i++) {
+      dests[_i].emit('unpipe', this);
+    }return this;
   }
 
   // try to find the right one.
   var i = indexOf(state.pipes, dest);
-  if (i === -1)
-    return this;
+  if (i === -1) return this;
 
   state.pipes.splice(i, 1);
   state.pipesCount -= 1;
-  if (state.pipesCount === 1)
-    state.pipes = state.pipes[0];
+  if (state.pipesCount === 1) state.pipes = state.pipes[0];
 
   dest.emit('unpipe', this);
 
@@ -699,27 +659,19 @@ Readable.prototype.unpipe = function(dest) {
 
 // set up data events if they are asked for
 // Ensure readable listeners eventually get something
-Readable.prototype.on = function(ev, fn) {
+Readable.prototype.on = function (ev, fn) {
   var res = Stream.prototype.on.call(this, ev, fn);
 
-  // If listening to data, and it has not explicitly been paused,
-  // then call resume to start the flow of data on the next tick.
-  if (ev === 'data' && false !== this._readableState.flowing) {
-    this.resume();
-  }
-
-  if (ev === 'readable' && this.readable) {
+  if (ev === 'data') {
+    // Start flowing on next tick if stream isn't explicitly paused
+    if (this._readableState.flowing !== false) this.resume();
+  } else if (ev === 'readable') {
     var state = this._readableState;
-    if (!state.readableListening) {
-      state.readableListening = true;
+    if (!state.endEmitted && !state.readableListening) {
+      state.readableListening = state.needReadable = true;
       state.emittedReadable = false;
-      state.needReadable = true;
       if (!state.reading) {
-        var self = this;
-        process.nextTick(function() {
-          debug('readable nexttick read 0');
-          self.read(0);
-        });
+        processNextTick(nReadingNextTick, this);
       } else if (state.length) {
         emitReadable(this, state);
       }
@@ -730,17 +682,18 @@ Readable.prototype.on = function(ev, fn) {
 };
 Readable.prototype.addListener = Readable.prototype.on;
 
+function nReadingNextTick(self) {
+  debug('readable nexttick read 0');
+  self.read(0);
+}
+
 // pause() and resume() are remnants of the legacy readable stream API
 // If the user uses them, then switch into old mode.
-Readable.prototype.resume = function() {
+Readable.prototype.resume = function () {
   var state = this._readableState;
   if (!state.flowing) {
     debug('resume');
     state.flowing = true;
-    if (!state.reading) {
-      debug('resume read 0');
-      this.read(0);
-    }
     resume(this, state);
   }
   return this;
@@ -749,21 +702,24 @@ Readable.prototype.resume = function() {
 function resume(stream, state) {
   if (!state.resumeScheduled) {
     state.resumeScheduled = true;
-    process.nextTick(function() {
-      resume_(stream, state);
-    });
+    processNextTick(resume_, stream, state);
   }
 }
 
 function resume_(stream, state) {
+  if (!state.reading) {
+    debug('resume read 0');
+    stream.read(0);
+  }
+
   state.resumeScheduled = false;
+  state.awaitDrain = 0;
   stream.emit('resume');
   flow(stream);
-  if (state.flowing && !state.reading)
-    stream.read(0);
+  if (state.flowing && !state.reading) stream.read(0);
 }
 
-Readable.prototype.pause = function() {
+Readable.prototype.pause = function () {
   debug('call pause flowing=%j', this._readableState.flowing);
   if (false !== this._readableState.flowing) {
     debug('pause');
@@ -776,38 +732,33 @@ Readable.prototype.pause = function() {
 function flow(stream) {
   var state = stream._readableState;
   debug('flow', state.flowing);
-  if (state.flowing) {
-    do {
-      var chunk = stream.read();
-    } while (null !== chunk && state.flowing);
-  }
+  while (state.flowing && stream.read() !== null) {}
 }
 
 // wrap an old-style stream as the async data source.
 // This is *not* part of the readable stream interface.
 // It is an ugly unfortunate mess of history.
-Readable.prototype.wrap = function(stream) {
+Readable.prototype.wrap = function (stream) {
   var state = this._readableState;
   var paused = false;
 
   var self = this;
-  stream.on('end', function() {
+  stream.on('end', function () {
     debug('wrapped end');
     if (state.decoder && !state.ended) {
       var chunk = state.decoder.end();
-      if (chunk && chunk.length)
-        self.push(chunk);
+      if (chunk && chunk.length) self.push(chunk);
     }
 
     self.push(null);
   });
 
-  stream.on('data', function(chunk) {
+  stream.on('data', function (chunk) {
     debug('wrapped data');
-    if (state.decoder)
-      chunk = state.decoder.write(chunk);
-    if (!chunk || !state.objectMode && !chunk.length)
-      return;
+    if (state.decoder) chunk = state.decoder.write(chunk);
+
+    // don't skip over falsy values in objectMode
+    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
 
     var ret = self.push(chunk);
     if (!ret) {
@@ -819,22 +770,24 @@ Readable.prototype.wrap = function(stream) {
   // proxy all the other methods.
   // important when wrapping filters and duplexes.
   for (var i in stream) {
-    if (util.isFunction(stream[i]) && util.isUndefined(this[i])) {
-      this[i] = function(method) { return function() {
-        return stream[method].apply(stream, arguments);
-      }}(i);
+    if (this[i] === undefined && typeof stream[i] === 'function') {
+      this[i] = function (method) {
+        return function () {
+          return stream[method].apply(stream, arguments);
+        };
+      }(i);
     }
   }
 
   // proxy certain important events.
   var events = ['error', 'close', 'destroy', 'pause', 'resume'];
-  forEach(events, function(ev) {
+  forEach(events, function (ev) {
     stream.on(ev, self.emit.bind(self, ev));
   });
 
   // when we try to consume some more bytes, simply unpause the
   // underlying stream.
-  self._read = function(n) {
+  self._read = function (n) {
     debug('wrapped _read', n);
     if (paused) {
       paused = false;
@@ -845,74 +798,106 @@ Readable.prototype.wrap = function(stream) {
   return self;
 };
 
-
-
 // exposed for testing purposes only.
 Readable._fromList = fromList;
 
 // Pluck off n bytes from an array of buffers.
 // Length is the combined lengths of all the buffers in the list.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
 function fromList(n, state) {
-  var list = state.buffer;
-  var length = state.length;
-  var stringMode = !!state.decoder;
-  var objectMode = !!state.objectMode;
+  // nothing buffered
+  if (state.length === 0) return null;
+
   var ret;
+  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
+    // read it all, truncate the list
+    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);
+    state.buffer.clear();
+  } else {
+    // read part of list
+    ret = fromListPartial(n, state.buffer, state.decoder);
+  }
 
-  // nothing in the list, definitely empty.
-  if (list.length === 0)
-    return null;
+  return ret;
+}
 
-  if (length === 0)
-    ret = null;
-  else if (objectMode)
+// Extracts only enough buffered data to satisfy the amount requested.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromListPartial(n, list, hasStrings) {
+  var ret;
+  if (n < list.head.data.length) {
+    // slice is the same for buffers and strings
+    ret = list.head.data.slice(0, n);
+    list.head.data = list.head.data.slice(n);
+  } else if (n === list.head.data.length) {
+    // first chunk is a perfect match
     ret = list.shift();
-  else if (!n || n >= length) {
-    // read it all, truncate the array.
-    if (stringMode)
-      ret = list.join('');
-    else
-      ret = Buffer.concat(list, length);
-    list.length = 0;
   } else {
-    // read just some of it.
-    if (n < list[0].length) {
-      // just take a part of the first list item.
-      // slice is the same for buffers and strings.
-      var buf = list[0];
-      ret = buf.slice(0, n);
-      list[0] = buf.slice(n);
-    } else if (n === list[0].length) {
-      // first list is a perfect match
-      ret = list.shift();
-    } else {
-      // complex case.
-      // we have enough to cover it, but it spans past the first buffer.
-      if (stringMode)
-        ret = '';
-      else
-        ret = new Buffer(n);
-
-      var c = 0;
-      for (var i = 0, l = list.length; i < l && c < n; i++) {
-        var buf = list[0];
-        var cpy = Math.min(n - c, buf.length);
-
-        if (stringMode)
-          ret += buf.slice(0, cpy);
-        else
-          buf.copy(ret, c, 0, cpy);
-
-        if (cpy < buf.length)
-          list[0] = buf.slice(cpy);
-        else
-          list.shift();
-
-        c += cpy;
+    // result spans more than one buffer
+    ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);
+  }
+  return ret;
+}
+
+// Copies a specified amount of characters from the list of buffered data
+// chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBufferString(n, list) {
+  var p = list.head;
+  var c = 1;
+  var ret = p.data;
+  n -= ret.length;
+  while (p = p.next) {
+    var str = p.data;
+    var nb = n > str.length ? str.length : n;
+    if (nb === str.length) ret += str;else ret += str.slice(0, n);
+    n -= nb;
+    if (n === 0) {
+      if (nb === str.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = str.slice(nb);
       }
+      break;
     }
+    ++c;
   }
+  list.length -= c;
+  return ret;
+}
 
+// Copies a specified amount of bytes from the list of buffered data chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBuffer(n, list) {
+  var ret = bufferShim.allocUnsafe(n);
+  var p = list.head;
+  var c = 1;
+  p.data.copy(ret);
+  n -= p.data.length;
+  while (p = p.next) {
+    var buf = p.data;
+    var nb = n > buf.length ? buf.length : n;
+    buf.copy(ret, ret.length - n, 0, nb);
+    n -= nb;
+    if (n === 0) {
+      if (nb === buf.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = buf.slice(nb);
+      }
+      break;
+    }
+    ++c;
+  }
+  list.length -= c;
   return ret;
 }
 
@@ -921,31 +906,32 @@ function endReadable(stream) {
 
   // If we get here before consuming all the bytes, then that is a
   // bug in node.  Should never happen.
-  if (state.length > 0)
-    throw new Error('endReadable called on non-empty stream');
+  if (state.length > 0) throw new Error('"endReadable()" called on non-empty stream');
 
   if (!state.endEmitted) {
     state.ended = true;
-    process.nextTick(function() {
-      // Check that we didn't get one last unshift.
-      if (!state.endEmitted && state.length === 0) {
-        state.endEmitted = true;
-        stream.readable = false;
-        stream.emit('end');
-      }
-    });
+    processNextTick(endReadableNT, state, stream);
+  }
+}
+
+function endReadableNT(state, stream) {
+  // Check that we didn't get one last unshift.
+  if (!state.endEmitted && state.length === 0) {
+    state.endEmitted = true;
+    stream.readable = false;
+    stream.emit('end');
   }
 }
 
-function forEach (xs, f) {
+function forEach(xs, f) {
   for (var i = 0, l = xs.length; i < l; i++) {
     f(xs[i], i);
   }
 }
 
-function indexOf (xs, x) {
+function indexOf(xs, x) {
   for (var i = 0, l = xs.length; i < l; i++) {
     if (xs[i] === x) return i;
   }
   return -1;
-}
+}
\ No newline at end of file
diff --git a/node_modules/readable-stream/lib/_stream_transform.js b/node_modules/readable-stream/lib/_stream_transform.js
index 905c5e450..dbc996ede 100644
--- a/node_modules/readable-stream/lib/_stream_transform.js
+++ b/node_modules/readable-stream/lib/_stream_transform.js
@@ -1,25 +1,3 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-
 // a transform stream is a readable/writable stream where you do
 // something with the data.  Sometimes it's called a "filter",
 // but that's not a great name for it, since that implies a thing where
@@ -62,6 +40,8 @@
 // would be consumed, and then the rest would wait (un-transformed) until
 // the results of the previous transformed chunk were consumed.
 
+'use strict';
+
 module.exports = Transform;
 
 var Duplex = require('./_stream_duplex');
@@ -73,9 +53,8 @@ util.inherits = require('inherits');
 
 util.inherits(Transform, Duplex);
 
-
-function TransformState(options, stream) {
-  this.afterTransform = function(er, data) {
+function TransformState(stream) {
+  this.afterTransform = function (er, data) {
     return afterTransform(stream, er, data);
   };
 
@@ -83,6 +62,7 @@ function TransformState(options, stream) {
   this.transforming = false;
   this.writecb = null;
   this.writechunk = null;
+  this.writeencoding = null;
 }
 
 function afterTransform(stream, er, data) {
@@ -91,17 +71,14 @@ function afterTransform(stream, er, data) {
 
   var cb = ts.writecb;
 
-  if (!cb)
-    return stream.emit('error', new Error('no writecb in Transform class'));
+  if (!cb) return stream.emit('error', new Error('no writecb in Transform class'));
 
   ts.writechunk = null;
   ts.writecb = null;
 
-  if (!util.isNullOrUndefined(data))
-    stream.push(data);
+  if (data !== null && data !== undefined) stream.push(data);
 
-  if (cb)
-    cb(er);
+  cb(er);
 
   var rs = stream._readableState;
   rs.reading = false;
@@ -110,14 +87,12 @@ function afterTransform(stream, er, data) {
   }
 }
 
-
 function Transform(options) {
-  if (!(this instanceof Transform))
-    return new Transform(options);
+  if (!(this instanceof Transform)) return new Transform(options);
 
   Duplex.call(this, options);
 
-  this._transformState = new TransformState(options, this);
+  this._transformState = new TransformState(this);
 
   // when the writable side finishes, then flush out anything remaining.
   var stream = this;
@@ -130,17 +105,20 @@ function Transform(options) {
   // sync guard flag.
   this._readableState.sync = false;
 
-  this.once('prefinish', function() {
-    if (util.isFunction(this._flush))
-      this._flush(function(er) {
-        done(stream, er);
-      });
-    else
-      done(stream);
+  if (options) {
+    if (typeof options.transform === 'function') this._transform = options.transform;
+
+    if (typeof options.flush === 'function') this._flush = options.flush;
+  }
+
+  this.once('prefinish', function () {
+    if (typeof this._flush === 'function') this._flush(function (er) {
+      done(stream, er);
+    });else done(stream);
   });
 }
 
-Transform.prototype.push = function(chunk, encoding) {
+Transform.prototype.push = function (chunk, encoding) {
   this._transformState.needTransform = false;
   return Duplex.prototype.push.call(this, chunk, encoding);
 };
@@ -155,31 +133,28 @@ Transform.prototype.push = function(chunk, encoding) {
 // Call `cb(err)` when you are done with this chunk.  If you pass
 // an error, then that'll put the hurt on the whole operation.  If you
 // never call cb(), then you'll never get another chunk.
-Transform.prototype._transform = function(chunk, encoding, cb) {
-  throw new Error('not implemented');
+Transform.prototype._transform = function (chunk, encoding, cb) {
+  throw new Error('Not implemented');
 };
 
-Transform.prototype._write = function(chunk, encoding, cb) {
+Transform.prototype._write = function (chunk, encoding, cb) {
   var ts = this._transformState;
   ts.writecb = cb;
   ts.writechunk = chunk;
   ts.writeencoding = encoding;
   if (!ts.transforming) {
     var rs = this._readableState;
-    if (ts.needTransform ||
-        rs.needReadable ||
-        rs.length < rs.highWaterMark)
-      this._read(rs.highWaterMark);
+    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
   }
 };
 
 // Doesn't matter what the args are here.
 // _transform does all the work.
 // That we got here means that the readable side wants more data.
-Transform.prototype._read = function(n) {
+Transform.prototype._read = function (n) {
   var ts = this._transformState;
 
-  if (!util.isNull(ts.writechunk) && ts.writecb && !ts.transforming) {
+  if (ts.writechunk !== null && ts.writecb && !ts.transforming) {
     ts.transforming = true;
     this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
   } else {
@@ -189,21 +164,17 @@ Transform.prototype._read = function(n) {
   }
 };
 
-
 function done(stream, er) {
-  if (er)
-    return stream.emit('error', er);
+  if (er) return stream.emit('error', er);
 
   // if there's nothing in the write buffer, then that means
   // that nothing more will ever be provided
   var ws = stream._writableState;
   var ts = stream._transformState;
 
-  if (ws.length)
-    throw new Error('calling transform done when ws.length != 0');
+  if (ws.length) throw new Error('Calling transform done when ws.length != 0');
 
-  if (ts.transforming)
-    throw new Error('calling transform done when still transforming');
+  if (ts.transforming) throw new Error('Calling transform done when still transforming');
 
   return stream.push(null);
-}
+}
\ No newline at end of file
diff --git a/node_modules/readable-stream/lib/_stream_writable.js b/node_modules/readable-stream/lib/_stream_writable.js
index db8539cd5..ed5efcbd2 100644
--- a/node_modules/readable-stream/lib/_stream_writable.js
+++ b/node_modules/readable-stream/lib/_stream_writable.js
@@ -1,73 +1,80 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
 // A bit simpler than readable streams.
-// Implement an async ._write(chunk, cb), and it'll handle all
+// Implement an async ._write(chunk, encoding, cb), and it'll handle all
 // the drain event emission and buffering.
 
+'use strict';
+
 module.exports = Writable;
 
 /*<replacement>*/
-var Buffer = require('buffer').Buffer;
+var processNextTick = require('process-nextick-args');
 /*</replacement>*/
 
-Writable.WritableState = WritableState;
+/*<replacement>*/
+var asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : processNextTick;
+/*</replacement>*/
 
+Writable.WritableState = WritableState;
 
 /*<replacement>*/
 var util = require('core-util-is');
 util.inherits = require('inherits');
 /*</replacement>*/
 
-var Stream = require('stream');
+/*<replacement>*/
+var internalUtil = {
+  deprecate: require('util-deprecate')
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream;
+(function () {
+  try {
+    Stream = require('st' + 'ream');
+  } catch (_) {} finally {
+    if (!Stream) Stream = require('events').EventEmitter;
+  }
+})();
+/*</replacement>*/
+
+var Buffer = require('buffer').Buffer;
+/*<replacement>*/
+var bufferShim = require('buffer-shims');
+/*</replacement>*/
 
 util.inherits(Writable, Stream);
 
+function nop() {}
+
 function WriteReq(chunk, encoding, cb) {
   this.chunk = chunk;
   this.encoding = encoding;
   this.callback = cb;
+  this.next = null;
 }
 
+var Duplex;
 function WritableState(options, stream) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
   options = options || {};
 
-  // the point at which write() starts returning false
-  // Note: 0 is a valid value, means that we always return false if
-  // the entire buffer is not flushed immediately on write()
-  var hwm = options.highWaterMark;
-  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
-  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
-
   // object stream flag to indicate whether or not this stream
   // contains buffers or objects.
   this.objectMode = !!options.objectMode;
 
-  if (stream instanceof Duplex)
-    this.objectMode = this.objectMode || !!options.writableObjectMode;
+  if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.writableObjectMode;
+
+  // the point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write()
+  var hwm = options.highWaterMark;
+  var defaultHwm = this.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm;
 
   // cast to ints.
-  this.highWaterMark = ~~this.highWaterMark;
+  this.highWaterMark = ~ ~this.highWaterMark;
 
   this.needDrain = false;
   // at the start of calling end()
@@ -111,7 +118,7 @@ function WritableState(options, stream) {
   this.bufferProcessing = false;
 
   // the callback that's passed to _write(chunk,cb)
-  this.onwrite = function(er) {
+  this.onwrite = function (er) {
     onwrite(stream, er);
   };
 
@@ -121,7 +128,8 @@ function WritableState(options, stream) {
   // the amount that is being written when _write is called.
   this.writelen = 0;
 
-  this.buffer = [];
+  this.bufferedRequest = null;
+  this.lastBufferedRequest = null;
 
   // number of pending user-supplied write callbacks
   // this must be 0 before 'finish' can be emitted
@@ -133,37 +141,67 @@ function WritableState(options, stream) {
 
   // True if the error was already emitted and should not be thrown again
   this.errorEmitted = false;
+
+  // count buffered requests
+  this.bufferedRequestCount = 0;
+
+  // allocate the first CorkedRequest, there is always
+  // one allocated and free to use, and we maintain at most two
+  this.corkedRequestsFree = new CorkedRequest(this);
 }
 
+WritableState.prototype.getBuffer = function writableStateGetBuffer() {
+  var current = this.bufferedRequest;
+  var out = [];
+  while (current) {
+    out.push(current);
+    current = current.next;
+  }
+  return out;
+};
+
+(function () {
+  try {
+    Object.defineProperty(WritableState.prototype, 'buffer', {
+      get: internalUtil.deprecate(function () {
+        return this.getBuffer();
+      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.')
+    });
+  } catch (_) {}
+})();
+
+var Duplex;
 function Writable(options) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
   // Writable ctor is applied to Duplexes, though they're not
   // instanceof Writable, they're instanceof Readable.
-  if (!(this instanceof Writable) && !(this instanceof Duplex))
-    return new Writable(options);
+  if (!(this instanceof Writable) && !(this instanceof Duplex)) return new Writable(options);
 
   this._writableState = new WritableState(options, this);
 
   // legacy.
   this.writable = true;
 
+  if (options) {
+    if (typeof options.write === 'function') this._write = options.write;
+
+    if (typeof options.writev === 'function') this._writev = options.writev;
+  }
+
   Stream.call(this);
 }
 
 // Otherwise people can pipe Writable streams, which is just wrong.
-Writable.prototype.pipe = function() {
-  this.emit('error', new Error('Cannot pipe. Not readable.'));
+Writable.prototype.pipe = function () {
+  this.emit('error', new Error('Cannot pipe, not readable'));
 };
 
-
-function writeAfterEnd(stream, state, cb) {
+function writeAfterEnd(stream, cb) {
   var er = new Error('write after end');
   // TODO: defer error events consistently everywhere, not just the cb
   stream.emit('error', er);
-  process.nextTick(function() {
-    cb(er);
-  });
+  processNextTick(cb, er);
 }
 
 // If we get something that is not a buffer, string, null, or undefined,
@@ -173,40 +211,37 @@ function writeAfterEnd(stream, state, cb) {
 // how many bytes or characters.
 function validChunk(stream, state, chunk, cb) {
   var valid = true;
-  if (!util.isBuffer(chunk) &&
-      !util.isString(chunk) &&
-      !util.isNullOrUndefined(chunk) &&
-      !state.objectMode) {
-    var er = new TypeError('Invalid non-string/buffer chunk');
+  var er = false;
+  // Always throw error if a null is written
+  // if we are not in object mode then throw
+  // if it is not a buffer, string, or undefined.
+  if (chunk === null) {
+    er = new TypeError('May not write null values to stream');
+  } else if (!Buffer.isBuffer(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
+    er = new TypeError('Invalid non-string/buffer chunk');
+  }
+  if (er) {
     stream.emit('error', er);
-    process.nextTick(function() {
-      cb(er);
-    });
+    processNextTick(cb, er);
     valid = false;
   }
   return valid;
 }
 
-Writable.prototype.write = function(chunk, encoding, cb) {
+Writable.prototype.write = function (chunk, encoding, cb) {
   var state = this._writableState;
   var ret = false;
 
-  if (util.isFunction(encoding)) {
+  if (typeof encoding === 'function') {
     cb = encoding;
     encoding = null;
   }
 
-  if (util.isBuffer(chunk))
-    encoding = 'buffer';
-  else if (!encoding)
-    encoding = state.defaultEncoding;
+  if (Buffer.isBuffer(chunk)) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
 
-  if (!util.isFunction(cb))
-    cb = function() {};
+  if (typeof cb !== 'function') cb = nop;
 
-  if (state.ended)
-    writeAfterEnd(this, state, cb);
-  else if (validChunk(this, state, chunk, cb)) {
+  if (state.ended) writeAfterEnd(this, cb);else if (validChunk(this, state, chunk, cb)) {
     state.pendingcb++;
     ret = writeOrBuffer(this, state, chunk, encoding, cb);
   }
@@ -214,32 +249,33 @@ Writable.prototype.write = function(chunk, encoding, cb) {
   return ret;
 };
 
-Writable.prototype.cork = function() {
+Writable.prototype.cork = function () {
   var state = this._writableState;
 
   state.corked++;
 };
 
-Writable.prototype.uncork = function() {
+Writable.prototype.uncork = function () {
   var state = this._writableState;
 
   if (state.corked) {
     state.corked--;
 
-    if (!state.writing &&
-        !state.corked &&
-        !state.finished &&
-        !state.bufferProcessing &&
-        state.buffer.length)
-      clearBuffer(this, state);
+    if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
   }
 };
 
+Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
+  // node::ParseEncoding() requires lower case.
+  if (typeof encoding === 'string') encoding = encoding.toLowerCase();
+  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding);
+  this._writableState.defaultEncoding = encoding;
+  return this;
+};
+
 function decodeChunk(state, chunk, encoding) {
-  if (!state.objectMode &&
-      state.decodeStrings !== false &&
-      util.isString(chunk)) {
-    chunk = new Buffer(chunk, encoding);
+  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
+    chunk = bufferShim.from(chunk, encoding);
   }
   return chunk;
 }
@@ -249,21 +285,28 @@ function decodeChunk(state, chunk, encoding) {
 // If we return false, then we need a drain event, so set that flag.
 function writeOrBuffer(stream, state, chunk, encoding, cb) {
   chunk = decodeChunk(state, chunk, encoding);
-  if (util.isBuffer(chunk))
-    encoding = 'buffer';
+
+  if (Buffer.isBuffer(chunk)) encoding = 'buffer';
   var len = state.objectMode ? 1 : chunk.length;
 
   state.length += len;
 
   var ret = state.length < state.highWaterMark;
   // we must ensure that previous needDrain will not be reset to false.
-  if (!ret)
-    state.needDrain = true;
+  if (!ret) state.needDrain = true;
 
-  if (state.writing || state.corked)
-    state.buffer.push(new WriteReq(chunk, encoding, cb));
-  else
+  if (state.writing || state.corked) {
+    var last = state.lastBufferedRequest;
+    state.lastBufferedRequest = new WriteReq(chunk, encoding, cb);
+    if (last) {
+      last.next = state.lastBufferedRequest;
+    } else {
+      state.bufferedRequest = state.lastBufferedRequest;
+    }
+    state.bufferedRequestCount += 1;
+  } else {
     doWrite(stream, state, false, len, chunk, encoding, cb);
+  }
 
   return ret;
 }
@@ -273,23 +316,13 @@ function doWrite(stream, state, writev, len, chunk, encoding, cb) {
   state.writecb = cb;
   state.writing = true;
   state.sync = true;
-  if (writev)
-    stream._writev(chunk, state.onwrite);
-  else
-    stream._write(chunk, encoding, state.onwrite);
+  if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
   state.sync = false;
 }
 
 function onwriteError(stream, state, sync, er, cb) {
-  if (sync)
-    process.nextTick(function() {
-      state.pendingcb--;
-      cb(er);
-    });
-  else {
-    state.pendingcb--;
-    cb(er);
-  }
+  --state.pendingcb;
+  if (sync) processNextTick(cb, er);else cb(er);
 
   stream._writableState.errorEmitted = true;
   stream.emit('error', er);
@@ -309,32 +342,26 @@ function onwrite(stream, er) {
 
   onwriteStateUpdate(state);
 
-  if (er)
-    onwriteError(stream, state, sync, er, cb);
-  else {
+  if (er) onwriteError(stream, state, sync, er, cb);else {
     // Check if we're actually ready to finish, but don't emit yet
-    var finished = needFinish(stream, state);
+    var finished = needFinish(state);
 
-    if (!finished &&
-        !state.corked &&
-        !state.bufferProcessing &&
-        state.buffer.length) {
+    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
       clearBuffer(stream, state);
     }
 
     if (sync) {
-      process.nextTick(function() {
-        afterWrite(stream, state, finished, cb);
-      });
+      /*<replacement>*/
+      asyncWrite(afterWrite, stream, state, finished, cb);
+      /*</replacement>*/
     } else {
-      afterWrite(stream, state, finished, cb);
-    }
+        afterWrite(stream, state, finished, cb);
+      }
   }
 }
 
 function afterWrite(stream, state, finished, cb) {
-  if (!finished)
-    onwriteDrain(stream, state);
+  if (!finished) onwriteDrain(stream, state);
   state.pendingcb--;
   cb();
   finishMaybe(stream, state);
@@ -350,80 +377,83 @@ function onwriteDrain(stream, state) {
   }
 }
 
-
 // if there's something in the buffer waiting, then process it
 function clearBuffer(stream, state) {
   state.bufferProcessing = true;
+  var entry = state.bufferedRequest;
 
-  if (stream._writev && state.buffer.length > 1) {
+  if (stream._writev && entry && entry.next) {
     // Fast case, write everything using _writev()
-    var cbs = [];
-    for (var c = 0; c < state.buffer.length; c++)
-      cbs.push(state.buffer[c].callback);
+    var l = state.bufferedRequestCount;
+    var buffer = new Array(l);
+    var holder = state.corkedRequestsFree;
+    holder.entry = entry;
+
+    var count = 0;
+    while (entry) {
+      buffer[count] = entry;
+      entry = entry.next;
+      count += 1;
+    }
 
-    // count the one we are adding, as well.
-    // TODO(isaacs) clean this up
-    state.pendingcb++;
-    doWrite(stream, state, true, state.length, state.buffer, '', function(err) {
-      for (var i = 0; i < cbs.length; i++) {
-        state.pendingcb--;
-        cbs[i](err);
-      }
-    });
+    doWrite(stream, state, true, state.length, buffer, '', holder.finish);
 
-    // Clear buffer
-    state.buffer = [];
+    // doWrite is almost always async, defer these to save a bit of time
+    // as the hot path ends with doWrite
+    state.pendingcb++;
+    state.lastBufferedRequest = null;
+    if (holder.next) {
+      state.corkedRequestsFree = holder.next;
+      holder.next = null;
+    } else {
+      state.corkedRequestsFree = new CorkedRequest(state);
+    }
   } else {
     // Slow case, write chunks one-by-one
-    for (var c = 0; c < state.buffer.length; c++) {
-      var entry = state.buffer[c];
+    while (entry) {
       var chunk = entry.chunk;
       var encoding = entry.encoding;
       var cb = entry.callback;
       var len = state.objectMode ? 1 : chunk.length;
 
       doWrite(stream, state, false, len, chunk, encoding, cb);
-
+      entry = entry.next;
       // if we didn't call the onwrite immediately, then
       // it means that we need to wait until it does.
       // also, that means that the chunk and cb are currently
       // being processed, so move the buffer counter past them.
       if (state.writing) {
-        c++;
         break;
       }
     }
 
-    if (c < state.buffer.length)
-      state.buffer = state.buffer.slice(c);
-    else
-      state.buffer.length = 0;
+    if (entry === null) state.lastBufferedRequest = null;
   }
 
+  state.bufferedRequestCount = 0;
+  state.bufferedRequest = entry;
   state.bufferProcessing = false;
 }
 
-Writable.prototype._write = function(chunk, encoding, cb) {
+Writable.prototype._write = function (chunk, encoding, cb) {
   cb(new Error('not implemented'));
-
 };
 
 Writable.prototype._writev = null;
 
-Writable.prototype.end = function(chunk, encoding, cb) {
+Writable.prototype.end = function (chunk, encoding, cb) {
   var state = this._writableState;
 
-  if (util.isFunction(chunk)) {
+  if (typeof chunk === 'function') {
     cb = chunk;
     chunk = null;
     encoding = null;
-  } else if (util.isFunction(encoding)) {
+  } else if (typeof encoding === 'function') {
     cb = encoding;
     encoding = null;
   }
 
-  if (!util.isNullOrUndefined(chunk))
-    this.write(chunk, encoding);
+  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);
 
   // .end() fully uncorks
   if (state.corked) {
@@ -432,16 +462,11 @@ Writable.prototype.end = function(chunk, encoding, cb) {
   }
 
   // ignore unnecessary end() calls.
-  if (!state.ending && !state.finished)
-    endWritable(this, state, cb);
+  if (!state.ending && !state.finished) endWritable(this, state, cb);
 };
 
-
-function needFinish(stream, state) {
-  return (state.ending &&
-          state.length === 0 &&
-          !state.finished &&
-          !state.writing);
+function needFinish(state) {
+  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
 }
 
 function prefinish(stream, state) {
@@ -452,14 +477,15 @@ function prefinish(stream, state) {
 }
 
 function finishMaybe(stream, state) {
-  var need = needFinish(stream, state);
+  var need = needFinish(state);
   if (need) {
     if (state.pendingcb === 0) {
       prefinish(stream, state);
       state.finished = true;
       stream.emit('finish');
-    } else
+    } else {
       prefinish(stream, state);
+    }
   }
   return need;
 }
@@ -468,10 +494,33 @@ function endWritable(stream, state, cb) {
   state.ending = true;
   finishMaybe(stream, state);
   if (cb) {
-    if (state.finished)
-      process.nextTick(cb);
-    else
-      stream.once('finish', cb);
+    if (state.finished) processNextTick(cb);else stream.once('finish', cb);
   }
   state.ended = true;
+  stream.writable = false;
 }
+
+// It seems a linked list but it is not
+// there will be only 2 of these for each stream
+function CorkedRequest(state) {
+  var _this = this;
+
+  this.next = null;
+  this.entry = null;
+
+  this.finish = function (err) {
+    var entry = _this.entry;
+    _this.entry = null;
+    while (entry) {
+      var cb = entry.callback;
+      state.pendingcb--;
+      cb(err);
+      entry = entry.next;
+    }
+    if (state.corkedRequestsFree) {
+      state.corkedRequestsFree.next = _this;
+    } else {
+      state.corkedRequestsFree = _this;
+    }
+  };
+}
\ No newline at end of file
diff --git a/node_modules/readable-stream/lib/internal/streams/BufferList.js b/node_modules/readable-stream/lib/internal/streams/BufferList.js
new file mode 100644
index 000000000..e4bfcf02d
--- /dev/null
+++ b/node_modules/readable-stream/lib/internal/streams/BufferList.js
@@ -0,0 +1,64 @@
+'use strict';
+
+var Buffer = require('buffer').Buffer;
+/*<replacement>*/
+var bufferShim = require('buffer-shims');
+/*</replacement>*/
+
+module.exports = BufferList;
+
+function BufferList() {
+  this.head = null;
+  this.tail = null;
+  this.length = 0;
+}
+
+BufferList.prototype.push = function (v) {
+  var entry = { data: v, next: null };
+  if (this.length > 0) this.tail.next = entry;else this.head = entry;
+  this.tail = entry;
+  ++this.length;
+};
+
+BufferList.prototype.unshift = function (v) {
+  var entry = { data: v, next: this.head };
+  if (this.length === 0) this.tail = entry;
+  this.head = entry;
+  ++this.length;
+};
+
+BufferList.prototype.shift = function () {
+  if (this.length === 0) return;
+  var ret = this.head.data;
+  if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
+  --this.length;
+  return ret;
+};
+
+BufferList.prototype.clear = function () {
+  this.head = this.tail = null;
+  this.length = 0;
+};
+
+BufferList.prototype.join = function (s) {
+  if (this.length === 0) return '';
+  var p = this.head;
+  var ret = '' + p.data;
+  while (p = p.next) {
+    ret += s + p.data;
+  }return ret;
+};
+
+BufferList.prototype.concat = function (n) {
+  if (this.length === 0) return bufferShim.alloc(0);
+  if (this.length === 1) return this.head.data;
+  var ret = bufferShim.allocUnsafe(n >>> 0);
+  var p = this.head;
+  var i = 0;
+  while (p) {
+    p.data.copy(ret, i);
+    i += p.data.length;
+    p = p.next;
+  }
+  return ret;
+};
\ No newline at end of file
diff --git a/node_modules/readable-stream/package.json b/node_modules/readable-stream/package.json
index 84096b349..42930904e 100644
--- a/node_modules/readable-stream/package.json
+++ b/node_modules/readable-stream/package.json
@@ -1,112 +1,49 @@
 {
-  "_args": [
-    [
-      {
-        "raw": "readable-stream@~1.1.9",
-        "scope": null,
-        "escapedName": "readable-stream",
-        "name": "readable-stream",
-        "rawSpec": "~1.1.9",
-        "spec": ">=1.1.9 <1.2.0",
-        "type": "range"
-      },
-      "/home/dold/repos/taler/wallet-webex/node_modules/duplexer2"
-    ]
-  ],
-  "_from": "readable-stream@>=1.1.9 <1.2.0",
-  "_id": "readable-stream@1.1.14",
-  "_inCache": true,
-  "_location": "/readable-stream",
-  "_nodeVersion": "5.10.1",
-  "_npmOperationalInternal": {
-    "host": "packages-16-east.internal.npmjs.com",
-    "tmp": "tmp/readable-stream-1.1.14.tgz_1460563293219_0.5682175166439265"
-  },
-  "_npmUser": {
-    "name": "cwmma",
-    "email": "calvin.metcalf@gmail.com"
-  },
-  "_npmVersion": "3.8.3",
-  "_phantomChildren": {},
-  "_requested": {
-    "raw": "readable-stream@~1.1.9",
-    "scope": null,
-    "escapedName": "readable-stream",
-    "name": "readable-stream",
-    "rawSpec": "~1.1.9",
-    "spec": ">=1.1.9 <1.2.0",
-    "type": "range"
-  },
-  "_requiredBy": [
-    "/duplexer2"
-  ],
-  "_resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz",
-  "_shasum": "7cf4c54ef648e3813084c636dd2079e166c081d9",
-  "_shrinkwrap": null,
-  "_spec": "readable-stream@~1.1.9",
-  "_where": "/home/dold/repos/taler/wallet-webex/node_modules/duplexer2",
-  "author": {
-    "name": "Isaac Z. Schlueter",
-    "email": "i@izs.me",
-    "url": "http://blog.izs.me/"
-  },
-  "browser": {
-    "util": false
-  },
-  "bugs": {
-    "url": "https://github.com/isaacs/readable-stream/issues"
-  },
+  "name": "readable-stream",
+  "version": "2.1.5",
+  "description": "Streams3, a user-land copy of the stream library from Node.js",
+  "main": "readable.js",
   "dependencies": {
+    "buffer-shims": "^1.0.0",
     "core-util-is": "~1.0.0",
     "inherits": "~2.0.1",
-    "isarray": "0.0.1",
-    "string_decoder": "~0.10.x"
+    "isarray": "~1.0.0",
+    "process-nextick-args": "~1.0.6",
+    "string_decoder": "~0.10.x",
+    "util-deprecate": "~1.0.1"
   },
-  "description": "Streams3, a user-land copy of the stream library from Node.js v0.11.x",
   "devDependencies": {
-    "tap": "~0.2.6"
+    "assert": "~1.4.0",
+    "babel-polyfill": "^6.9.1",
+    "nyc": "^6.4.0",
+    "tap": "~0.7.1",
+    "tape": "~4.5.1",
+    "zuul": "~3.10.0"
   },
-  "directories": {},
-  "dist": {
-    "shasum": "7cf4c54ef648e3813084c636dd2079e166c081d9",
-    "tarball": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz"
+  "scripts": {
+    "test": "tap test/parallel/*.js test/ours/*.js",
+    "browser": "npm run write-zuul && zuul --browser-retries 2 -- test/browser.js",
+    "write-zuul": "printf \"ui: tape\nbrowsers:\n  - name: $BROWSER_NAME\n    version: $BROWSER_VERSION\n\">.zuul.yml",
+    "local": "zuul --local 3000 --no-coverage -- test/browser.js",
+    "cover": "nyc npm test",
+    "report": "nyc report --reporter=lcov"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/nodejs/readable-stream"
   },
-  "gitHead": "52550840cb1d6e8a98ef9a909a4bea360bc6f7da",
-  "homepage": "https://github.com/isaacs/readable-stream#readme",
   "keywords": [
     "readable",
     "stream",
     "pipe"
   ],
-  "license": "MIT",
-  "main": "readable.js",
-  "maintainers": [
-    {
-      "name": "isaacs",
-      "email": "isaacs@npmjs.com"
-    },
-    {
-      "name": "tootallnate",
-      "email": "nathan@tootallnate.net"
-    },
-    {
-      "name": "rvagg",
-      "email": "rod@vagg.org"
-    },
-    {
-      "name": "cwmma",
-      "email": "calvin.metcalf@gmail.com"
-    }
-  ],
-  "name": "readable-stream",
-  "optionalDependencies": {},
-  "readme": "ERROR: No README data found!",
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/isaacs/readable-stream.git"
+  "browser": {
+    "util": false
   },
-  "scripts": {
-    "test": "tap test/simple/*.js"
+  "nyc": {
+    "include": [
+      "lib/**.js"
+    ]
   },
-  "version": "1.1.14"
+  "license": "MIT"
 }
diff --git a/node_modules/readable-stream/readable.js b/node_modules/readable-stream/readable.js
index 2a8b5c6b5..be2688a07 100644
--- a/node_modules/readable-stream/readable.js
+++ b/node_modules/readable-stream/readable.js
@@ -1,10 +1,16 @@
+var Stream = (function (){
+  try {
+    return require('st' + 'ream'); // hack to fix a circular dependency issue when used with browserify
+  } catch(_){}
+}());
 exports = module.exports = require('./lib/_stream_readable.js');
-exports.Stream = require('stream');
+exports.Stream = Stream || exports;
 exports.Readable = exports;
 exports.Writable = require('./lib/_stream_writable.js');
 exports.Duplex = require('./lib/_stream_duplex.js');
 exports.Transform = require('./lib/_stream_transform.js');
 exports.PassThrough = require('./lib/_stream_passthrough.js');
-if (!process.browser && process.env.READABLE_STREAM === 'disable') {
-  module.exports = require('stream');
+
+if (!process.browser && process.env.READABLE_STREAM === 'disable' && Stream) {
+  module.exports = Stream;
 }