node_modules

16 files changed, 4321 insertions, 0 deletions

diff --git a/node_modules/html-minifier/LICENSE b/node_modules/html-minifier/LICENSE
new file mode 100644
index 000000000..ed8f360a6
--- /dev/null
+++ b/node_modules/html-minifier/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2010-2016 Juriy "kangax" Zaytsev
+
+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.
diff --git a/node_modules/html-minifier/README.md b/node_modules/html-minifier/README.md
new file mode 100644
index 000000000..5338e9cc5
--- /dev/null
+++ b/node_modules/html-minifier/README.md
@@ -0,0 +1,159 @@
+# HTMLMinifier
+
+[![NPM version](https://img.shields.io/npm/v/html-minifier.svg)](https://www.npmjs.com/package/html-minifier)
+[![Build Status](https://img.shields.io/travis/kangax/html-minifier.svg)](https://travis-ci.org/kangax/html-minifier)
+[![Dependency Status](https://img.shields.io/david/kangax/html-minifier.svg)](https://david-dm.org/kangax/html-minifier)
+[![devDependency Status](https://img.shields.io/david/dev/kangax/html-minifier.svg)](https://david-dm.org/kangax/html-minifier?type=dev)
+[![Gitter](https://img.shields.io/gitter/room/kangax/html-minifier.svg)](https://gitter.im/kangax/html-minifier)
+
+[HTMLMinifier](http://kangax.github.io/html-minifier/) is a highly **configurable**, **well-tested**, JavaScript-based HTML minifier.
+
+See [corresponding blog post](http://perfectionkills.com/experimenting-with-html-minifier/) for all the gory details of [how it works](http://perfectionkills.com/experimenting-with-html-minifier/#how_it_works), [description of each option](http://perfectionkills.com/experimenting-with-html-minifier/#options), [testing results](http://perfectionkills.com/experimenting-with-html-minifier/#field_testing) and [conclusions](http://perfectionkills.com/experimenting-with-html-minifier/#cost_and_benefits).
+
+[Test suite is available online](http://kangax.github.io/html-minifier/tests/).
+
+Also see corresponding [Ruby wrapper](https://github.com/stereobooster/html_minifier), and for Node.js, [Grunt plugin](https://github.com/gruntjs/grunt-contrib-htmlmin), [Gulp module](https://github.com/jonschlinkert/gulp-htmlmin), [Koa middleware wrapper](https://github.com/koajs/html-minifier) and [Express middleware wrapper](https://github.com/melonmanchan/express-minify-html).
+
+For lint-like capabilities take a look at [HTMLLint](https://github.com/kangax/html-lint).
+
+## Minification comparison
+
+How does HTMLMinifier compare to other solutions — [HTML Minifier from Will Peavy](http://www.willpeavy.com/minifier/) (1st result in [Google search for "html minifier"](https://www.google.com/#q=html+minifier)) as well as [htmlcompressor.com](http://htmlcompressor.com) and [minimize](https://github.com/Swaagie/minimize)?
+
+| Site                                                                        | Original size *(KB)* | HTMLMinifier | minimize | Will Peavy | htmlcompressor.com |
+| --------------------------------------------------------------------------- |:--------------------:| ------------:| --------:| ----------:| ------------------:|
+| [Google](https://www.google.com/)                                           | 44                   | **42**       | 45       | 46         | 45                 |
+| [HTMLMinifier](https://github.com/kangax/html-minifier)                     | 124                  | **97**       | 105      | 109        | 104                |
+| [CNN](http://www.cnn.com/)                                                  | 131                  | **121**      | 129      | 130        | 124                |
+| [Amazon](http://www.amazon.co.uk/)                                          | 189                  | **158**      | 181      | 184        | n/a                |
+| [New York Times](http://www.nytimes.com/)                                   | 200                  | **131**      | 149      | 148        | 139                |
+| [Stack Overflow](http://stackoverflow.com/)                                 | 223                  | **172**      | 181      | 189        | 178                |
+| [BBC](http://www.bbc.co.uk/)                                                | 224                  | **185**      | 217      | 223        | 211                |
+| [Bootstrap CSS](http://getbootstrap.com/css/)                               | 272                  | **260**      | 269      | 229        | 269                |
+| [Wikipedia](https://en.wikipedia.org/wiki/President_of_the_United_States)   | 547                  | **500**      | 527      | 545        | 526                |
+| [NBC](http://www.nbc.com/)                                                  | 572                  | **549**      | 570      | 572        | 555                |
+| [Eloquent Javascript](http://eloquentjavascript.net/1st_edition/print.html) | 870                  | **815**      | 840      | 864        | n/a                |
+| [ES6 table](http://kangax.github.io/compat-table/es6/)                      | 4453                 | **3763**     | 4205     | n/a        | n/a                |
+| [ES6 draft](https://tc39.github.io/ecma262/)                                | 5505                 | **4913**     | 5060     | n/a        | n/a                |
+
+## Options Quick Reference
+
+Most of the options are disabled by default.
+
+| Option                         | Description     | Default |
+|--------------------------------|-----------------|---------|
+| `caseSensitive`                | Treat attributes in case sensitive manner (useful for custom HTML tags) | `false` |
+| `collapseBooleanAttributes`    | [Omit attribute values from boolean attributes](http://perfectionkills.com/experimenting-with-html-minifier/#collapse_boolean_attributes) | `false` |
+| `collapseInlineTagWhitespace`  | Don't leave any spaces between `display:inline;` elements when collapsing. Must be used in conjunction with `collapseWhitespace=true` | `false` |
+| `collapseWhitespace`           | [Collapse white space that contributes to text nodes in a document tree](http://perfectionkills.com/experimenting-with-html-minifier/#collapse_whitespace) | `false` |
+| `conservativeCollapse`         | Always collapse to 1 space (never remove it entirely). Must be used in conjunction with `collapseWhitespace=true` | `false` |
+| `customAttrAssign`             | Arrays of regex'es that allow to support custom attribute assign expressions (e.g. `'<div flex?="{{mode != cover}}"></div>'`) | `[ ]` |
+| `customAttrCollapse`           | Regex that specifies custom attribute to strip newlines from (e.g. `/ng-class/`) | |
+| `customAttrSurround`           | Arrays of regex'es that allow to support custom attribute surround expressions (e.g. `<input {{#if value}}checked="checked"{{/if}}>`) | `[ ]` |
+| `customEventAttributes`        | Arrays of regex'es that allow to support custom event attributes for `minifyJS` (e.g. `ng-click`) | `[ /^on[a-z]{3,}$/ ]` |
+| `decodeEntities`               | Use direct Unicode characters whenever possible | `false` |
+| `html5`                        | Parse input according to HTML5 specifications | `true` |
+| `ignoreCustomComments`         | Array of regex'es that allow to ignore certain comments, when matched | `[ /^!/ ]` |
+| `ignoreCustomFragments`        | Array of regex'es that allow to ignore certain fragments, when matched (e.g. `<?php ... ?>`, `{{ ... }}`, etc.)  | `[ /<%[\s\S]*?%>/, /<\?[\s\S]*?\?>/ ]` |
+| `includeAutoGeneratedTags`     | Insert tags generated by HTML parser | `true` |
+| `keepClosingSlash`             | Keep the trailing slash on singleton elements | `false` |
+| `maxLineLength`                | Specify a maximum line length. Compressed output will be split by newlines at valid HTML split-points |
+| `minifyCSS`                    | Minify CSS in style elements and style attributes (uses [clean-css](https://github.com/jakubpawlowicz/clean-css)) | `false` (could be `true`, `Object`, `Function(text)`) |
+| `minifyJS`                     | Minify JavaScript in script elements and event attributes (uses [UglifyJS](https://github.com/mishoo/UglifyJS2)) | `false` (could be `true`, `Object`, `Function(text, inline)`) |
+| `minifyURLs`                   | Minify URLs in various attributes (uses [relateurl](https://github.com/stevenvachon/relateurl)) | `false` (could be `String`, `Object`, `Function(text)`) |
+| `preserveLineBreaks`           | Always collapse to 1 line break (never remove it entirely) when whitespace between tags include a line break. Must be used in conjunction with `collapseWhitespace=true` | `false` |
+| `preventAttributesEscaping`    | Prevents the escaping of the values of attributes | `false` |
+| `processConditionalComments`   | Process contents of conditional comments through minifier | `false` |
+| `processScripts`               | Array of strings corresponding to types of script elements to process through minifier (e.g. `text/ng-template`, `text/x-handlebars-template`, etc.) | `[ ]` |
+| `quoteCharacter`               | Type of quote to use for attribute values (' or ") | |
+| `removeAttributeQuotes`        | [Remove quotes around attributes when possible](http://perfectionkills.com/experimenting-with-html-minifier/#remove_attribute_quotes) | `false` |
+| `removeComments`               | [Strip HTML comments](http://perfectionkills.com/experimenting-with-html-minifier/#remove_comments) | `false` |
+| `removeEmptyAttributes`        | [Remove all attributes with whitespace-only values](http://perfectionkills.com/experimenting-with-html-minifier/#remove_empty_or_blank_attributes) | `false` (could be `true`, `Function(attrName, tag)`) |
+| `removeEmptyElements`          | [Remove all elements with empty contents](http://perfectionkills.com/experimenting-with-html-minifier/#remove_empty_elements) | `false` |
+| `removeOptionalTags`           | [Remove optional tags](http://perfectionkills.com/experimenting-with-html-minifier/#remove_optional_tags) | `false` |
+| `removeRedundantAttributes`    | [Remove attributes when value matches default.](http://perfectionkills.com/experimenting-with-html-minifier/#remove_redundant_attributes) | `false` |
+| `removeScriptTypeAttributes`   | Remove `type="text/javascript"` from `script` tags. Other `type` attribute values are left intact | `false` |
+| `removeStyleLinkTypeAttributes`| Remove `type="text/css"` from `style` and `link` tags. Other `type` attribute values are left intact | `false` |
+| `removeTagWhitespace`          | Remove space between attributes whenever possible. **Note that this will result in invalid HTML!** | `false` |
+| `sortAttributes`               | [Sort attributes by frequency](#sorting-attributes--style-classes) | `false` |
+| `sortClassName`                | [Sort style classes by frequency](#sorting-attributes--style-classes) | `false` |
+| `trimCustomFragments`          | Trim white space around `ignoreCustomFragments`. | `false` |
+| `useShortDoctype`              | [Replaces the `doctype` with the short (HTML5) doctype](http://perfectionkills.com/experimenting-with-html-minifier/#use_short_doctype) | `false` |
+
+### Sorting attributes / style classes
+
+Minifier options like `sortAttributes` and `sortClassName` won't impact the plain-text size of the output. However, they form long repetitive chains of characters that should improve compression ratio of gzip used in HTTP compression.
+
+## Special cases
+
+### Ignoring chunks of markup
+
+If you have chunks of markup you would like preserved, you can wrap them `<!-- htmlmin:ignore -->`.
+
+### Preserving SVG tags
+
+SVG tags are automatically recognized, and when they are minified, both case-sensitivity and closing-slashes are preserved, regardless of the minification settings used for the rest of the file.
+
+### Working with invalid markup
+
+HTMLMinifier **can't work with invalid or partial chunks of markup**. This is because it parses markup into a tree structure, then modifies it (removing anything that was specified for removal, ignoring anything that was specified to be ignored, etc.), then it creates a markup out of that tree and returns it.
+
+Input markup (e.g. `<p id="">foo`)
+
+↓
+
+Internal representation of markup in a form of tree (e.g. `{ tag: "p", attr: "id", children: ["foo"] }`)
+
+↓
+
+Transformation of internal representation (e.g. removal of `id` attribute)
+
+↓
+
+Output of resulting markup (e.g. `<p>foo</p>`)
+
+HTMLMinifier can't know that original markup was only half of the tree; it does its best to try to parse it as a full tree and it loses information about tree being malformed or partial in the beginning. As a result, it can't create a partial/malformed tree at the time of the output.
+
+## Installation Instructions
+
+From NPM for use as a command line app:
+
+```shell
+npm install html-minifier -g
+```
+
+From NPM for programmatic use:
+
+```shell
+npm install html-minifier
+```
+
+From Git:
+
+```shell
+git clone git://github.com/kangax/html-minifier.git
+cd html-minifier
+npm link .
+```
+
+## Usage
+
+For command line usage please see `html-minifier --help`
+
+### Node.js
+
+```js
+var minify = require('html-minifier').minify;
+var result = minify('<p title="blah" id="moo">foo</p>', {
+  removeAttributeQuotes: true
+});
+result; // '<p title=blah id=moo>foo</p>'
+```
+
+## Running benchmarks
+
+Benchmarks for minified HTML:
+
+```shell
+node benchmark.js
+```
diff --git a/node_modules/html-minifier/cli.js b/node_modules/html-minifier/cli.js
new file mode 100755
index 000000000..aba7ec876
--- /dev/null
+++ b/node_modules/html-minifier/cli.js
@@ -0,0 +1,309 @@
+#!/usr/bin/env node
+/**
+ * html-minifier CLI tool
+ *
+ * The MIT License (MIT)
+ *
+ *  Copyright (c) 2014-2016 Zoltan Frombach
+ *
+ *  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';
+
+var camelCase = require('camel-case');
+var fs = require('fs');
+var info = require('./package.json');
+var minify = require('./' + info.main).minify;
+var paramCase = require('param-case');
+var path = require('path');
+var program = require('commander');
+
+program._name = info.name;
+program.version(info.version);
+
+function fatal(message) {
+  console.error(message);
+  process.exit(1);
+}
+
+/**
+ * JSON does not support regexes, so, e.g., JSON.parse() will not create
+ * a RegExp from the JSON value `[ "/matchString/" ]`, which is
+ * technically just an array containing a string that begins and end with
+ * a forward slash. To get a RegExp from a JSON string, it must be
+ * constructed explicitly in JavaScript.
+ *
+ * The likelihood of actually wanting to match text that is enclosed in
+ * forward slashes is probably quite rare, so if forward slashes were
+ * included in an argument that requires a regex, the user most likely
+ * thought they were part of the syntax for specifying a regex.
+ *
+ * In the unlikely case that forward slashes are indeed desired in the
+ * search string, the user would need to enclose the expression in a
+ * second set of slashes:
+ *
+ *    --customAttrSrround "[\"//matchString//\"]"
+ */
+function parseRegExp(value) {
+  if (value) {
+    return new RegExp(value.replace(/^\/(.*)\/$/, '$1'));
+  }
+}
+
+function parseJSON(value) {
+  if (value) {
+    try {
+      return JSON.parse(value);
+    }
+    catch (e) {
+      if (/^{/.test(value)) {
+        fatal('Could not parse JSON value \'' + value + '\'');
+      }
+      return value;
+    }
+  }
+}
+
+function parseJSONArray(value) {
+  if (value) {
+    value = parseJSON(value);
+    return Array.isArray(value) ? value : [value];
+  }
+}
+
+function parseJSONRegExpArray(value) {
+  value = parseJSONArray(value);
+  return value && value.map(parseRegExp);
+}
+
+function parseString(value) {
+  return value;
+}
+
+var mainOptions = {
+  caseSensitive: 'Treat attributes in case sensitive manner (useful for SVG; e.g. viewBox)',
+  collapseBooleanAttributes: 'Omit attribute values from boolean attributes',
+  collapseInlineTagWhitespace: 'Collapse white space around inline tag',
+  collapseWhitespace: 'Collapse white space that contributes to text nodes in a document tree.',
+  conservativeCollapse: 'Always collapse to 1 space (never remove it entirely)',
+  customAttrAssign: ['Arrays of regex\'es that allow to support custom attribute assign expressions (e.g. \'<div flex?="{{mode != cover}}"></div>\')', parseJSONRegExpArray],
+  customAttrCollapse: ['Regex that specifies custom attribute to strip newlines from (e.g. /ng-class/)', parseRegExp],
+  customAttrSurround: ['Arrays of regex\'es that allow to support custom attribute surround expressions (e.g. <input {{#if value}}checked="checked"{{/if}}>)', parseJSONRegExpArray],
+  customEventAttributes: ['Arrays of regex\'es that allow to support custom event attributes for minifyJS (e.g. ng-click)', parseJSONRegExpArray],
+  decodeEntities: 'Use direct Unicode characters whenever possible',
+  html5: 'Parse input according to HTML5 specifications',
+  ignoreCustomComments: ['Array of regex\'es that allow to ignore certain comments, when matched', parseJSONRegExpArray],
+  ignoreCustomFragments: ['Array of regex\'es that allow to ignore certain fragments, when matched (e.g. <?php ... ?>, {{ ... }})', parseJSONRegExpArray],
+  includeAutoGeneratedTags: 'Insert tags generated by HTML parser',
+  keepClosingSlash: 'Keep the trailing slash on singleton elements',
+  maxLineLength: ['Max line length', parseInt],
+  minifyCSS: ['Minify CSS in style elements and style attributes (uses clean-css)', parseJSON],
+  minifyJS: ['Minify Javascript in script elements and on* attributes (uses uglify-js)', parseJSON],
+  minifyURLs: ['Minify URLs in various attributes (uses relateurl)', parseJSON],
+  preserveLineBreaks: 'Always collapse to 1 line break (never remove it entirely) when whitespace between tags include a line break.',
+  preventAttributesEscaping: 'Prevents the escaping of the values of attributes.',
+  processConditionalComments: 'Process contents of conditional comments through minifier',
+  processScripts: ['Array of strings corresponding to types of script elements to process through minifier (e.g. "text/ng-template", "text/x-handlebars-template", etc.)', parseJSONArray],
+  quoteCharacter: ['Type of quote to use for attribute values (\' or ")', parseString],
+  removeAttributeQuotes: 'Remove quotes around attributes when possible.',
+  removeComments: 'Strip HTML comments',
+  removeEmptyAttributes: 'Remove all attributes with whitespace-only values',
+  removeEmptyElements: 'Remove all elements with empty contents',
+  removeOptionalTags: 'Remove unrequired tags',
+  removeRedundantAttributes: 'Remove attributes when value matches default.',
+  removeScriptTypeAttributes: 'Remove type="text/javascript" from script tags. Other type attribute values are left intact.',
+  removeStyleLinkTypeAttributes: 'Remove type="text/css" from style and link tags. Other type attribute values are left intact.',
+  removeTagWhitespace: 'Remove space between attributes whenever possible',
+  sortAttributes: 'Sort attributes by frequency',
+  sortClassName: 'Sort style classes by frequency',
+  trimCustomFragments: 'Trim white space around ignoreCustomFragments.',
+  useShortDoctype: 'Replaces the doctype with the short (HTML5) doctype'
+};
+var mainOptionKeys = Object.keys(mainOptions);
+mainOptionKeys.forEach(function(key) {
+  var option = mainOptions[key];
+  key = '--' + paramCase(key);
+  if (Array.isArray(option)) {
+    var optional = option[1] === parseJSON;
+    program.option(key + (optional ? ' [value]' : ' <value>'), option[0], option[1]);
+  }
+  else {
+    program.option(key, option);
+  }
+});
+program.option('-o --output <file>', 'Specify output file (if not specified STDOUT will be used for output)', function(outputPath) {
+  return fs.createWriteStream(outputPath).on('error', function(e) {
+    fatal('Cannot write ' + outputPath + '\n' + e.message);
+  });
+}, process.stdout);
+
+function readFile(file) {
+  try {
+    return fs.readFileSync(file, { encoding: 'utf8' });
+  }
+  catch (e) {
+    fatal('Cannot read ' + file + '\n' + e.message);
+  }
+}
+
+var config = {};
+program.option('-c --config-file <file>', 'Use config file', function(configPath) {
+  var data = readFile(configPath);
+  try {
+    config = JSON.parse(data);
+  }
+  catch (je) {
+    try {
+      config = require(path.resolve(configPath));
+    }
+    catch (ne) {
+      fatal('Cannot read the specified config file.\nAs JSON: ' + je.message + '\nAs module: ' + ne.message);
+    }
+  }
+  mainOptionKeys.forEach(function(key) {
+    if (key in config) {
+      var option = mainOptions[key];
+      if (Array.isArray(option)) {
+        var value = config[key];
+        config[key] = option[1](typeof value === 'string' ? value : JSON.stringify(value));
+      }
+    }
+  });
+});
+program.option('--input-dir <dir>', 'Specify an input directory');
+program.option('--output-dir <dir>', 'Specify an output directory');
+program.option('--file-ext <text>', 'Specify an extension to be read, ex: html');
+var content;
+program.arguments('[files...]').action(function(files) {
+  content = files.map(readFile).join('');
+}).parse(process.argv);
+
+function createOptions() {
+  var options = {};
+  mainOptionKeys.forEach(function(key) {
+    var param = program[camelCase(key)];
+    if (typeof param !== 'undefined') {
+      options[key] = param;
+    }
+    else if (key in config) {
+      options[key] = config[key];
+    }
+  });
+  return options;
+}
+
+function mkdir(outputDir, callback) {
+  fs.mkdir(outputDir, function(err) {
+    if (err) {
+      switch (err.code) {
+        case 'ENOENT':
+          return mkdir(path.join(outputDir, '..'), function() {
+            mkdir(outputDir, callback);
+          });
+        case 'EEXIST':
+          break;
+        default:
+          fatal('Cannot create directory ' + outputDir + '\n' + err.message);
+      }
+    }
+    callback();
+  });
+}
+
+function processFile(inputFile, outputFile) {
+  fs.readFile(inputFile, { encoding: 'utf8' }, function(err, data) {
+    if (err) {
+      fatal('Cannot read ' + inputFile + '\n' + err.message);
+    }
+    var minified;
+    try {
+      minified = minify(data, createOptions());
+    }
+    catch (e) {
+      fatal('Minification error on ' + inputFile + '\n' + e.message);
+    }
+    fs.writeFile(outputFile, minified, { encoding: 'utf8' }, function(err) {
+      if (err) {
+        fatal('Cannot write ' + outputFile + '\n' + err.message);
+      }
+    });
+  });
+}
+
+function processDirectory(inputDir, outputDir, fileExt) {
+  fs.readdir(inputDir, function(err, files) {
+    if (err) {
+      fatal('Cannot read directory ' + inputDir + '\n' + err.message);
+    }
+    files.forEach(function(file) {
+      var inputFile = path.join(inputDir, file);
+      var outputFile = path.join(outputDir, file);
+      fs.stat(inputFile, function(err, stat) {
+        if (err) {
+          fatal('Cannot read ' + inputFile + '\n' + err.message);
+        }
+        else if (stat.isDirectory()) {
+          processDirectory(inputFile, outputFile, fileExt);
+        }
+        else if (!fileExt || path.extname(file) === '.' + fileExt) {
+          mkdir(outputDir, function() {
+            processFile(inputFile, outputFile);
+          });
+        }
+      });
+    });
+  });
+}
+
+function writeMinify() {
+  var minified;
+  try {
+    minified = minify(content, createOptions());
+  }
+  catch (e) {
+    fatal('Minification error:\n' + e.message);
+  }
+  program.output.write(minified);
+}
+
+var inputDir = program.inputDir;
+var outputDir = program.outputDir;
+var fileExt = program.fileExt;
+if (inputDir || outputDir) {
+  if (!inputDir) {
+    fatal('The option output-dir needs to be used with the option input-dir. If you are working with a single file, use -o.');
+  }
+  else if (!outputDir) {
+    fatal('You need to specify where to write the output files with the option --output-dir');
+  }
+  processDirectory(inputDir, outputDir, fileExt);
+}
+// Minifying one or more files specified on the CMD line
+else if (typeof content === 'string') {
+  writeMinify();
+}
+// Minifying input coming from STDIN
+else {
+  content = '';
+  process.stdin.setEncoding('utf8');
+  process.stdin.on('data', function(data) {
+    content += data;
+  }).on('end', writeMinify);
+}
diff --git a/node_modules/html-minifier/node_modules/.bin/he b/node_modules/html-minifier/node_modules/.bin/he
new file mode 120000
index 000000000..a81124c26
--- /dev/null
+++ b/node_modules/html-minifier/node_modules/.bin/he
@@ -0,0 +1 @@
+../../../he/bin/he
\ No newline at end of file
diff --git a/node_modules/html-minifier/node_modules/.bin/uglifyjs b/node_modules/html-minifier/node_modules/.bin/uglifyjs
new file mode 120000
index 000000000..aaaeee8ac
--- /dev/null
+++ b/node_modules/html-minifier/node_modules/.bin/uglifyjs
@@ -0,0 +1 @@
+../../../uglify-js/bin/uglifyjs
\ No newline at end of file
diff --git a/node_modules/html-minifier/node_modules/commander/History.md b/node_modules/html-minifier/node_modules/commander/History.md
new file mode 100644
index 000000000..1b47439cb
--- /dev/null
+++ b/node_modules/html-minifier/node_modules/commander/History.md
@@ -0,0 +1,261 @@
+
+2.9.0 / 2015-10-13
+==================
+
+  * Add option `isDefault` to set default subcommand #415 @Qix-
+  * Add callback to allow filtering or post-processing of help text #434 @djulien
+  * Fix `undefined` text in help information close #414 #416 @zhiyelee
+
+2.8.1 / 2015-04-22
+==================
+
+ * Back out `support multiline description` Close #396 #397
+
+2.8.0 / 2015-04-07
+==================
+
+  * Add `process.execArg` support, execution args like `--harmony` will be passed to sub-commands #387 @DigitalIO @zhiyelee
+  * Fix bug in Git-style sub-commands #372 @zhiyelee
+  * Allow commands to be hidden from help #383 @tonylukasavage
+  * When git-style sub-commands are in use, yet none are called, display help #382 @claylo
+  * Add ability to specify arguments syntax for top-level command #258 @rrthomas
+  * Support multiline descriptions #208 @zxqfox
+
+2.7.1 / 2015-03-11
+==================
+
+ * Revert #347 (fix collisions when option and first arg have same name) which causes a bug in #367.
+
+2.7.0 / 2015-03-09
+==================
+
+ * Fix git-style bug when installed globally. Close #335 #349 @zhiyelee
+ * Fix collisions when option and first arg have same name. Close #346 #347 @tonylukasavage
+ * Add support for camelCase on `opts()`. Close #353  @nkzawa
+ * Add node.js 0.12 and io.js to travis.yml
+ * Allow RegEx options. #337 @palanik
+ * Fixes exit code when sub-command failing.  Close #260 #332 @pirelenito
+ * git-style `bin` files in $PATH make sense. Close #196 #327  @zhiyelee
+
+2.6.0 / 2014-12-30
+==================
+
+  * added `Command#allowUnknownOption` method. Close #138 #318 @doozr @zhiyelee
+  * Add application description to the help msg. Close #112 @dalssoft
+
+2.5.1 / 2014-12-15
+==================
+
+  * fixed two bugs incurred by variadic arguments. Close #291 @Quentin01 #302 @zhiyelee
+
+2.5.0 / 2014-10-24
+==================
+
+ * add support for variadic arguments. Closes #277 @whitlockjc
+
+2.4.0 / 2014-10-17
+==================
+
+ * fixed a bug on executing the coercion function of subcommands option. Closes #270
+ * added `Command.prototype.name` to retrieve command name. Closes #264 #266 @tonylukasavage
+ * added `Command.prototype.opts` to retrieve all the options as a simple object of key-value pairs. Closes #262 @tonylukasavage
+ * fixed a bug on subcommand name. Closes #248 @jonathandelgado
+ * fixed function normalize doesn’t honor option terminator. Closes #216 @abbr
+
+2.3.0 / 2014-07-16
+==================
+
+ * add command alias'. Closes PR #210
+ * fix: Typos. Closes #99
+ * fix: Unused fs module. Closes #217
+
+2.2.0 / 2014-03-29
+==================
+
+ * add passing of previous option value
+ * fix: support subcommands on windows. Closes #142
+ * Now the defaultValue passed as the second argument of the coercion function.
+
+2.1.0 / 2013-11-21
+==================
+
+ * add: allow cflag style option params, unit test, fixes #174
+
+2.0.0 / 2013-07-18
+==================
+
+ * remove input methods (.prompt, .confirm, etc)
+
+1.3.2 / 2013-07-18
+==================
+
+ * add support for sub-commands to co-exist with the original command
+
+1.3.1 / 2013-07-18
+==================
+
+ * add quick .runningCommand hack so you can opt-out of other logic when running a sub command
+
+1.3.0 / 2013-07-09
+==================
+
+ * add EACCES error handling
+ * fix sub-command --help
+
+1.2.0 / 2013-06-13
+==================
+
+ * allow "-" hyphen as an option argument
+ * support for RegExp coercion
+
+1.1.1 / 2012-11-20
+==================
+
+  * add more sub-command padding
+  * fix .usage() when args are present. Closes #106
+
+1.1.0 / 2012-11-16
+==================
+
+  * add git-style executable subcommand support. Closes #94
+
+1.0.5 / 2012-10-09
+==================
+
+  * fix `--name` clobbering. Closes #92
+  * fix examples/help. Closes #89
+
+1.0.4 / 2012-09-03
+==================
+
+  * add `outputHelp()` method.
+
+1.0.3 / 2012-08-30
+==================
+
+  * remove invalid .version() defaulting
+
+1.0.2 / 2012-08-24
+==================
+
+  * add `--foo=bar` support [arv]
+  * fix password on node 0.8.8. Make backward compatible with 0.6 [focusaurus]
+
+1.0.1 / 2012-08-03
+==================
+
+  * fix issue #56
+  * fix tty.setRawMode(mode) was moved to tty.ReadStream#setRawMode() (i.e. process.stdin.setRawMode())
+
+1.0.0 / 2012-07-05
+==================
+
+  * add support for optional option descriptions
+  * add defaulting of `.version()` to package.json's version
+
+0.6.1 / 2012-06-01
+==================
+
+  * Added: append (yes or no) on confirmation
+  * Added: allow node.js v0.7.x
+
+0.6.0 / 2012-04-10
+==================
+
+  * Added `.prompt(obj, callback)` support. Closes #49
+  * Added default support to .choose(). Closes #41
+  * Fixed the choice example
+
+0.5.1 / 2011-12-20
+==================
+
+  * Fixed `password()` for recent nodes. Closes #36
+
+0.5.0 / 2011-12-04
+==================
+
+  * Added sub-command option support [itay]
+
+0.4.3 / 2011-12-04
+==================
+
+  * Fixed custom help ordering. Closes #32
+
+0.4.2 / 2011-11-24
+==================
+
+  * Added travis support
+  * Fixed: line-buffered input automatically trimmed. Closes #31
+
+0.4.1 / 2011-11-18
+==================
+
+  * Removed listening for "close" on --help
+
+0.4.0 / 2011-11-15
+==================
+
+  * Added support for `--`. Closes #24
+
+0.3.3 / 2011-11-14
+==================
+
+  * Fixed: wait for close event when writing help info [Jerry Hamlet]
+
+0.3.2 / 2011-11-01
+==================
+
+  * Fixed long flag definitions with values [felixge]
+
+0.3.1 / 2011-10-31
+==================
+
+  * Changed `--version` short flag to `-V` from `-v`
+  * Changed `.version()` so it's configurable [felixge]
+
+0.3.0 / 2011-10-31
+==================
+
+  * Added support for long flags only. Closes #18
+
+0.2.1 / 2011-10-24
+==================
+
+  * "node": ">= 0.4.x < 0.7.0". Closes #20
+
+0.2.0 / 2011-09-26
+==================
+
+  * Allow for defaults that are not just boolean. Default peassignment only occurs for --no-*, optional, and required arguments. [Jim Isaacs]
+
+0.1.0 / 2011-08-24
+==================
+
+  * Added support for custom `--help` output
+
+0.0.5 / 2011-08-18
+==================
+
+  * Changed: when the user enters nothing prompt for password again
+  * Fixed issue with passwords beginning with numbers [NuckChorris]
+
+0.0.4 / 2011-08-15
+==================
+
+  * Fixed `Commander#args`
+
+0.0.3 / 2011-08-15
+==================
+
+  * Added default option value support
+
+0.0.2 / 2011-08-15
+==================
+
+  * Added mask support to `Command#password(str[, mask], fn)`
+  * Added `Command#password(str, fn)`
+
+0.0.1 / 2010-01-03
+==================
+
+  * Initial release
diff --git a/node_modules/html-minifier/node_modules/commander/LICENSE b/node_modules/html-minifier/node_modules/commander/LICENSE
new file mode 100644
index 000000000..10f997ab1
--- /dev/null
+++ b/node_modules/html-minifier/node_modules/commander/LICENSE
@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2011 TJ Holowaychuk <tj@vision-media.ca>
+
+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.
diff --git a/node_modules/html-minifier/node_modules/commander/Readme.md b/node_modules/html-minifier/node_modules/commander/Readme.md
new file mode 100644
index 000000000..08b9e4cb9
--- /dev/null
+++ b/node_modules/html-minifier/node_modules/commander/Readme.md
@@ -0,0 +1,351 @@
+# Commander.js
+
+
+[![Build Status](https://api.travis-ci.org/tj/commander.js.svg)](http://travis-ci.org/tj/commander.js)
+[![NPM Version](http://img.shields.io/npm/v/commander.svg?style=flat)](https://www.npmjs.org/package/commander)
+[![NPM Downloads](https://img.shields.io/npm/dm/commander.svg?style=flat)](https://www.npmjs.org/package/commander)
+[![Join the chat at https://gitter.im/tj/commander.js](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/tj/commander.js?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+  The complete solution for [node.js](http://nodejs.org) command-line interfaces, inspired by Ruby's [commander](https://github.com/tj/commander).  
+  [API documentation](http://tj.github.com/commander.js/)
+
+
+## Installation
+
+    $ npm install commander
+
+## Option parsing
+
+ Options with commander are defined with the `.option()` method, also serving as documentation for the options. The example below parses args and options from `process.argv`, leaving remaining args as the `program.args` array which were not consumed by options.
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .option('-p, --peppers', 'Add peppers')
+  .option('-P, --pineapple', 'Add pineapple')
+  .option('-b, --bbq-sauce', 'Add bbq sauce')
+  .option('-c, --cheese [type]', 'Add the specified type of cheese [marble]', 'marble')
+  .parse(process.argv);
+
+console.log('you ordered a pizza with:');
+if (program.peppers) console.log('  - peppers');
+if (program.pineapple) console.log('  - pineapple');
+if (program.bbqSauce) console.log('  - bbq');
+console.log('  - %s cheese', program.cheese);
+```
+
+ Short flags may be passed as a single arg, for example `-abc` is equivalent to `-a -b -c`. Multi-word options such as "--template-engine" are camel-cased, becoming `program.templateEngine` etc.
+
+
+## Coercion
+
+```js
+function range(val) {
+  return val.split('..').map(Number);
+}
+
+function list(val) {
+  return val.split(',');
+}
+
+function collect(val, memo) {
+  memo.push(val);
+  return memo;
+}
+
+function increaseVerbosity(v, total) {
+  return total + 1;
+}
+
+program
+  .version('0.0.1')
+  .usage('[options] <file ...>')
+  .option('-i, --integer <n>', 'An integer argument', parseInt)
+  .option('-f, --float <n>', 'A float argument', parseFloat)
+  .option('-r, --range <a>..<b>', 'A range', range)
+  .option('-l, --list <items>', 'A list', list)
+  .option('-o, --optional [value]', 'An optional value')
+  .option('-c, --collect [value]', 'A repeatable value', collect, [])
+  .option('-v, --verbose', 'A value that can be increased', increaseVerbosity, 0)
+  .parse(process.argv);
+
+console.log(' int: %j', program.integer);
+console.log(' float: %j', program.float);
+console.log(' optional: %j', program.optional);
+program.range = program.range || [];
+console.log(' range: %j..%j', program.range[0], program.range[1]);
+console.log(' list: %j', program.list);
+console.log(' collect: %j', program.collect);
+console.log(' verbosity: %j', program.verbose);
+console.log(' args: %j', program.args);
+```
+
+## Regular Expression
+```js
+program
+  .version('0.0.1')
+  .option('-s --size <size>', 'Pizza size', /^(large|medium|small)$/i, 'medium')
+  .option('-d --drink [drink]', 'Drink', /^(coke|pepsi|izze)$/i)
+  .parse(process.argv);
+  
+console.log(' size: %j', program.size);
+console.log(' drink: %j', program.drink);
+```
+
+## Variadic arguments
+
+ The last argument of a command can be variadic, and only the last argument.  To make an argument variadic you have to
+ append `...` to the argument name.  Here is an example:
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .command('rmdir <dir> [otherDirs...]')
+  .action(function (dir, otherDirs) {
+    console.log('rmdir %s', dir);
+    if (otherDirs) {
+      otherDirs.forEach(function (oDir) {
+        console.log('rmdir %s', oDir);
+      });
+    }
+  });
+
+program.parse(process.argv);
+```
+
+ An `Array` is used for the value of a variadic argument.  This applies to `program.args` as well as the argument passed
+ to your action as demonstrated above.
+
+## Specify the argument syntax
+
+```js
+#!/usr/bin/env node
+
+var program = require('../');
+
+program
+  .version('0.0.1')
+  .arguments('<cmd> [env]')
+  .action(function (cmd, env) {
+     cmdValue = cmd;
+     envValue = env;
+  });
+
+program.parse(process.argv);
+
+if (typeof cmdValue === 'undefined') {
+   console.error('no command given!');
+   process.exit(1);
+}
+console.log('command:', cmdValue);
+console.log('environment:', envValue || "no environment given");
+```
+
+## Git-style sub-commands
+
+```js
+// file: ./examples/pm
+var program = require('..');
+
+program
+  .version('0.0.1')
+  .command('install [name]', 'install one or more packages')
+  .command('search [query]', 'search with optional query')
+  .command('list', 'list packages installed', {isDefault: true})
+  .parse(process.argv);
+```
+
+When `.command()` is invoked with a description argument, no `.action(callback)` should be called to handle sub-commands, otherwise there will be an error. This tells commander that you're going to use separate executables for sub-commands, much like `git(1)` and other popular tools.  
+The commander will try to search the executables in the directory of the entry script (like `./examples/pm`) with the name `program-command`, like `pm-install`, `pm-search`.
+
+Options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the option from the generated help output. Specifying `true` for `opts.isDefault` will run the subcommand if no other subcommand is specified.
+
+If the program is designed to be installed globally, make sure the executables have proper modes, like `755`.
+
+### `--harmony`
+
+You can enable `--harmony` option in two ways:
+* Use `#! /usr/bin/env node --harmony` in the sub-commands scripts. Note some os version don’t support this pattern.
+* Use the `--harmony` option when call the command, like `node --harmony examples/pm publish`. The `--harmony` option will be preserved when spawning sub-command process.
+
+## Automated --help
+
+ The help information is auto-generated based on the information commander already knows about your program, so the following `--help` info is for free:
+
+```  
+ $ ./examples/pizza --help
+
+   Usage: pizza [options]
+
+   An application for pizzas ordering
+
+   Options:
+
+     -h, --help           output usage information
+     -V, --version        output the version number
+     -p, --peppers        Add peppers
+     -P, --pineapple      Add pineapple
+     -b, --bbq            Add bbq sauce
+     -c, --cheese <type>  Add the specified type of cheese [marble]
+     -C, --no-cheese      You do not want any cheese
+
+```
+
+## Custom help
+
+ You can display arbitrary `-h, --help` information
+ by listening for "--help". Commander will automatically
+ exit once you are done so that the remainder of your program
+ does not execute causing undesired behaviours, for example
+ in the following executable "stuff" will not output when
+ `--help` is used.
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .option('-f, --foo', 'enable some foo')
+  .option('-b, --bar', 'enable some bar')
+  .option('-B, --baz', 'enable some baz');
+
+// must be before .parse() since
+// node's emit() is immediate
+
+program.on('--help', function(){
+  console.log('  Examples:');
+  console.log('');
+  console.log('    $ custom-help --help');
+  console.log('    $ custom-help -h');
+  console.log('');
+});
+
+program.parse(process.argv);
+
+console.log('stuff');
+```
+
+Yields the following help output when `node script-name.js -h` or `node script-name.js --help` are run:
+
+```
+
+Usage: custom-help [options]
+
+Options:
+
+  -h, --help     output usage information
+  -V, --version  output the version number
+  -f, --foo      enable some foo
+  -b, --bar      enable some bar
+  -B, --baz      enable some baz
+
+Examples:
+
+  $ custom-help --help
+  $ custom-help -h
+
+```
+
+## .outputHelp(cb)
+
+Output help information without exiting.
+Optional callback cb allows post-processing of help text before it is displayed.
+
+If you want to display help by default (e.g. if no command was provided), you can use something like:
+
+```js
+var program = require('commander');
+var colors = require('colors');
+
+program
+  .version('0.0.1')
+  .command('getstream [url]', 'get stream URL')
+  .parse(process.argv);
+
+  if (!process.argv.slice(2).length) {
+    program.outputHelp(make_red);
+  }
+
+function make_red(txt) {
+  return colors.red(txt); //display the help text in red on the console
+}
+```
+
+## .help(cb)
+
+  Output help information and exit immediately.
+  Optional callback cb allows post-processing of help text before it is displayed.
+
+## Examples
+
+```js
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .option('-C, --chdir <path>', 'change the working directory')
+  .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+  .option('-T, --no-tests', 'ignore test hook')
+
+program
+  .command('setup [env]')
+  .description('run setup commands for all envs')
+  .option("-s, --setup_mode [mode]", "Which setup mode to use")
+  .action(function(env, options){
+    var mode = options.setup_mode || "normal";
+    env = env || 'all';
+    console.log('setup for %s env(s) with %s mode', env, mode);
+  });
+
+program
+  .command('exec <cmd>')
+  .alias('ex')
+  .description('execute the given remote cmd')
+  .option("-e, --exec_mode <mode>", "Which exec mode to use")
+  .action(function(cmd, options){
+    console.log('exec "%s" using %s mode', cmd, options.exec_mode);
+  }).on('--help', function() {
+    console.log('  Examples:');
+    console.log();
+    console.log('    $ deploy exec sequential');
+    console.log('    $ deploy exec async');
+    console.log();
+  });
+
+program
+  .command('*')
+  .action(function(env){
+    console.log('deploying "%s"', env);
+  });
+
+program.parse(process.argv);
+```
+
+More Demos can be found in the [examples](https://github.com/tj/commander.js/tree/master/examples) directory.
+
+## License
+
+MIT
+
diff --git a/node_modules/html-minifier/node_modules/commander/index.js b/node_modules/html-minifier/node_modules/commander/index.js
new file mode 100644
index 000000000..a19c05d2e
--- /dev/null
+++ b/node_modules/html-minifier/node_modules/commander/index.js
@@ -0,0 +1,1110 @@
+/**
+ * Module dependencies.
+ */
+
+var EventEmitter = require('events').EventEmitter;
+var spawn = require('child_process').spawn;
+var readlink = require('graceful-readlink').readlinkSync;
+var path = require('path');
+var dirname = path.dirname;
+var basename = path.basename;
+var fs = require('fs');
+
+/**
+ * Expose the root command.
+ */
+
+exports = module.exports = new Command();
+
+/**
+ * Expose `Command`.
+ */
+
+exports.Command = Command;
+
+/**
+ * Expose `Option`.
+ */
+
+exports.Option = Option;
+
+/**
+ * Initialize a new `Option` with the given `flags` and `description`.
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @api public
+ */
+
+function Option(flags, description) {
+  this.flags = flags;
+  this.required = ~flags.indexOf('<');
+  this.optional = ~flags.indexOf('[');
+  this.bool = !~flags.indexOf('-no-');
+  flags = flags.split(/[ ,|]+/);
+  if (flags.length > 1 && !/^[[<]/.test(flags[1])) this.short = flags.shift();
+  this.long = flags.shift();
+  this.description = description || '';
+}
+
+/**
+ * Return option name.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Option.prototype.name = function() {
+  return this.long
+    .replace('--', '')
+    .replace('no-', '');
+};
+
+/**
+ * Check if `arg` matches the short or long flag.
+ *
+ * @param {String} arg
+ * @return {Boolean}
+ * @api private
+ */
+
+Option.prototype.is = function(arg) {
+  return arg == this.short || arg == this.long;
+};
+
+/**
+ * Initialize a new `Command`.
+ *
+ * @param {String} name
+ * @api public
+ */
+
+function Command(name) {
+  this.commands = [];
+  this.options = [];
+  this._execs = {};
+  this._allowUnknownOption = false;
+  this._args = [];
+  this._name = name || '';
+}
+
+/**
+ * Inherit from `EventEmitter.prototype`.
+ */
+
+Command.prototype.__proto__ = EventEmitter.prototype;
+
+/**
+ * Add command `name`.
+ *
+ * The `.action()` callback is invoked when the
+ * command `name` is specified via __ARGV__,
+ * and the remaining arguments are applied to the
+ * function for access.
+ *
+ * When the `name` is "*" an un-matched command
+ * will be passed as the first arg, followed by
+ * the rest of __ARGV__ remaining.
+ *
+ * Examples:
+ *
+ *      program
+ *        .version('0.0.1')
+ *        .option('-C, --chdir <path>', 'change the working directory')
+ *        .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+ *        .option('-T, --no-tests', 'ignore test hook')
+ *
+ *      program
+ *        .command('setup')
+ *        .description('run remote setup commands')
+ *        .action(function() {
+ *          console.log('setup');
+ *        });
+ *
+ *      program
+ *        .command('exec <cmd>')
+ *        .description('run the given remote command')
+ *        .action(function(cmd) {
+ *          console.log('exec "%s"', cmd);
+ *        });
+ *
+ *      program
+ *        .command('teardown <dir> [otherDirs...]')
+ *        .description('run teardown commands')
+ *        .action(function(dir, otherDirs) {
+ *          console.log('dir "%s"', dir);
+ *          if (otherDirs) {
+ *            otherDirs.forEach(function (oDir) {
+ *              console.log('dir "%s"', oDir);
+ *            });
+ *          }
+ *        });
+ *
+ *      program
+ *        .command('*')
+ *        .description('deploy the given env')
+ *        .action(function(env) {
+ *          console.log('deploying "%s"', env);
+ *        });
+ *
+ *      program.parse(process.argv);
+  *
+ * @param {String} name
+ * @param {String} [desc] for git-style sub-commands
+ * @return {Command} the new command
+ * @api public
+ */
+
+Command.prototype.command = function(name, desc, opts) {
+  opts = opts || {};
+  var args = name.split(/ +/);
+  var cmd = new Command(args.shift());
+
+  if (desc) {
+    cmd.description(desc);
+    this.executables = true;
+    this._execs[cmd._name] = true;
+    if (opts.isDefault) this.defaultExecutable = cmd._name;
+  }
+
+  cmd._noHelp = !!opts.noHelp;
+  this.commands.push(cmd);
+  cmd.parseExpectedArgs(args);
+  cmd.parent = this;
+
+  if (desc) return this;
+  return cmd;
+};
+
+/**
+ * Define argument syntax for the top-level command.
+ *
+ * @api public
+ */
+
+Command.prototype.arguments = function (desc) {
+  return this.parseExpectedArgs(desc.split(/ +/));
+};
+
+/**
+ * Add an implicit `help [cmd]` subcommand
+ * which invokes `--help` for the given command.
+ *
+ * @api private
+ */
+
+Command.prototype.addImplicitHelpCommand = function() {
+  this.command('help [cmd]', 'display help for [cmd]');
+};
+
+/**
+ * Parse expected `args`.
+ *
+ * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parseExpectedArgs = function(args) {
+  if (!args.length) return;
+  var self = this;
+  args.forEach(function(arg) {
+    var argDetails = {
+      required: false,
+      name: '',
+      variadic: false
+    };
+
+    switch (arg[0]) {
+      case '<':
+        argDetails.required = true;
+        argDetails.name = arg.slice(1, -1);
+        break;
+      case '[':
+        argDetails.name = arg.slice(1, -1);
+        break;
+    }
+
+    if (argDetails.name.length > 3 && argDetails.name.slice(-3) === '...') {
+      argDetails.variadic = true;
+      argDetails.name = argDetails.name.slice(0, -3);
+    }
+    if (argDetails.name) {
+      self._args.push(argDetails);
+    }
+  });
+  return this;
+};
+
+/**
+ * Register callback `fn` for the command.
+ *
+ * Examples:
+ *
+ *      program
+ *        .command('help')
+ *        .description('display verbose help')
+ *        .action(function() {
+ *           // output help here
+ *        });
+ *
+ * @param {Function} fn
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.action = function(fn) {
+  var self = this;
+  var listener = function(args, unknown) {
+    // Parse any so-far unknown options
+    args = args || [];
+    unknown = unknown || [];
+
+    var parsed = self.parseOptions(unknown);
+
+    // Output help if necessary
+    outputHelpIfNecessary(self, parsed.unknown);
+
+    // If there are still any unknown options, then we simply
+    // die, unless someone asked for help, in which case we give it
+    // to them, and then we die.
+    if (parsed.unknown.length > 0) {
+      self.unknownOption(parsed.unknown[0]);
+    }
+
+    // Leftover arguments need to be pushed back. Fixes issue #56
+    if (parsed.args.length) args = parsed.args.concat(args);
+
+    self._args.forEach(function(arg, i) {
+      if (arg.required && null == args[i]) {
+        self.missingArgument(arg.name);
+      } else if (arg.variadic) {
+        if (i !== self._args.length - 1) {
+          self.variadicArgNotLast(arg.name);
+        }
+
+        args[i] = args.splice(i);
+      }
+    });
+
+    // Always append ourselves to the end of the arguments,
+    // to make sure we match the number of arguments the user
+    // expects
+    if (self._args.length) {
+      args[self._args.length] = self;
+    } else {
+      args.push(self);
+    }
+
+    fn.apply(self, args);
+  };
+  var parent = this.parent || this;
+  var name = parent === this ? '*' : this._name;
+  parent.on(name, listener);
+  if (this._alias) parent.on(this._alias, listener);
+  return this;
+};
+
+/**
+ * Define option with `flags`, `description` and optional
+ * coercion `fn`.
+ *
+ * The `flags` string should contain both the short and long flags,
+ * separated by comma, a pipe or space. The following are all valid
+ * all will output this way when `--help` is used.
+ *
+ *    "-p, --pepper"
+ *    "-p|--pepper"
+ *    "-p --pepper"
+ *
+ * Examples:
+ *
+ *     // simple boolean defaulting to false
+ *     program.option('-p, --pepper', 'add pepper');
+ *
+ *     --pepper
+ *     program.pepper
+ *     // => Boolean
+ *
+ *     // simple boolean defaulting to true
+ *     program.option('-C, --no-cheese', 'remove cheese');
+ *
+ *     program.cheese
+ *     // => true
+ *
+ *     --no-cheese
+ *     program.cheese
+ *     // => false
+ *
+ *     // required argument
+ *     program.option('-C, --chdir <path>', 'change the working directory');
+ *
+ *     --chdir /tmp
+ *     program.chdir
+ *     // => "/tmp"
+ *
+ *     // optional argument
+ *     program.option('-c, --cheese [type]', 'add cheese [marble]');
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @param {Function|Mixed} fn or default
+ * @param {Mixed} defaultValue
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.option = function(flags, description, fn, defaultValue) {
+  var self = this
+    , option = new Option(flags, description)
+    , oname = option.name()
+    , name = camelcase(oname);
+
+  // default as 3rd arg
+  if (typeof fn != 'function') {
+    if (fn instanceof RegExp) {
+      var regex = fn;
+      fn = function(val, def) {
+        var m = regex.exec(val);
+        return m ? m[0] : def;
+      }
+    }
+    else {
+      defaultValue = fn;
+      fn = null;
+    }
+  }
+
+  // preassign default value only for --no-*, [optional], or <required>
+  if (false == option.bool || option.optional || option.required) {
+    // when --no-* we make sure default is true
+    if (false == option.bool) defaultValue = true;
+    // preassign only if we have a default
+    if (undefined !== defaultValue) self[name] = defaultValue;
+  }
+
+  // register the option
+  this.options.push(option);
+
+  // when it's passed assign the value
+  // and conditionally invoke the callback
+  this.on(oname, function(val) {
+    // coercion
+    if (null !== val && fn) val = fn(val, undefined === self[name]
+      ? defaultValue
+      : self[name]);
+
+    // unassigned or bool
+    if ('boolean' == typeof self[name] || 'undefined' == typeof self[name]) {
+      // if no value, bool true, and we have a default, then use it!
+      if (null == val) {
+        self[name] = option.bool
+          ? defaultValue || true
+          : false;
+      } else {
+        self[name] = val;
+      }
+    } else if (null !== val) {
+      // reassign
+      self[name] = val;
+    }
+  });
+
+  return this;
+};
+
+/**
+ * Allow unknown options on the command line.
+ *
+ * @param {Boolean} arg if `true` or omitted, no error will be thrown
+ * for unknown options.
+ * @api public
+ */
+Command.prototype.allowUnknownOption = function(arg) {
+    this._allowUnknownOption = arguments.length === 0 || arg;
+    return this;
+};
+
+/**
+ * Parse `argv`, settings options and invoking commands when defined.
+ *
+ * @param {Array} argv
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parse = function(argv) {
+  // implicit help
+  if (this.executables) this.addImplicitHelpCommand();
+
+  // store raw args
+  this.rawArgs = argv;
+
+  // guess name
+  this._name = this._name || basename(argv[1], '.js');
+
+  // github-style sub-commands with no sub-command
+  if (this.executables && argv.length < 3 && !this.defaultExecutable) {
+    // this user needs help
+    argv.push('--help');
+  }
+
+  // process argv
+  var parsed = this.parseOptions(this.normalize(argv.slice(2)));
+  var args = this.args = parsed.args;
+
+  var result = this.parseArgs(this.args, parsed.unknown);
+
+  // executable sub-commands
+  var name = result.args[0];
+  if (this._execs[name] && typeof this._execs[name] != "function") {
+    return this.executeSubCommand(argv, args, parsed.unknown);
+  } else if (this.defaultExecutable) {
+    // use the default subcommand
+    args.unshift(name = this.defaultExecutable);
+    return this.executeSubCommand(argv, args, parsed.unknown);
+  }
+
+  return result;
+};
+
+/**
+ * Execute a sub-command executable.
+ *
+ * @param {Array} argv
+ * @param {Array} args
+ * @param {Array} unknown
+ * @api private
+ */
+
+Command.prototype.executeSubCommand = function(argv, args, unknown) {
+  args = args.concat(unknown);
+
+  if (!args.length) this.help();
+  if ('help' == args[0] && 1 == args.length) this.help();
+
+  // <cmd> --help
+  if ('help' == args[0]) {
+    args[0] = args[1];
+    args[1] = '--help';
+  }
+
+  // executable
+  var f = argv[1];
+  // name of the subcommand, link `pm-install`
+  var bin = basename(f, '.js') + '-' + args[0];
+
+
+  // In case of globally installed, get the base dir where executable
+  //  subcommand file should be located at
+  var baseDir
+    , link = readlink(f);
+
+  // when symbolink is relative path
+  if (link !== f && link.charAt(0) !== '/') {
+    link = path.join(dirname(f), link)
+  }
+  baseDir = dirname(link);
+
+  // prefer local `./<bin>` to bin in the $PATH
+  var localBin = path.join(baseDir, bin);
+
+  // whether bin file is a js script with explicit `.js` extension
+  var isExplicitJS = false;
+  if (exists(localBin + '.js')) {
+    bin = localBin + '.js';
+    isExplicitJS = true;
+  } else if (exists(localBin)) {
+    bin = localBin;
+  }
+
+  args = args.slice(1);
+
+  var proc;
+  if (process.platform !== 'win32') {
+    if (isExplicitJS) {
+      args.unshift(localBin);
+      // add executable arguments to spawn
+      args = (process.execArgv || []).concat(args);
+
+      proc = spawn('node', args, { stdio: 'inherit', customFds: [0, 1, 2] });
+    } else {
+      proc = spawn(bin, args, { stdio: 'inherit', customFds: [0, 1, 2] });
+    }
+  } else {
+    args.unshift(localBin);
+    proc = spawn(process.execPath, args, { stdio: 'inherit'});
+  }
+
+  proc.on('close', process.exit.bind(process));
+  proc.on('error', function(err) {
+    if (err.code == "ENOENT") {
+      console.error('\n  %s(1) does not exist, try --help\n', bin);
+    } else if (err.code == "EACCES") {
+      console.error('\n  %s(1) not executable. try chmod or run with root\n', bin);
+    }
+    process.exit(1);
+  });
+
+  // Store the reference to the child process
+  this.runningCommand = proc;
+};
+
+/**
+ * Normalize `args`, splitting joined short flags. For example
+ * the arg "-abc" is equivalent to "-a -b -c".
+ * This also normalizes equal sign and splits "--abc=def" into "--abc def".
+ *
+ * @param {Array} args
+ * @return {Array}
+ * @api private
+ */
+
+Command.prototype.normalize = function(args) {
+  var ret = []
+    , arg
+    , lastOpt
+    , index;
+
+  for (var i = 0, len = args.length; i < len; ++i) {
+    arg = args[i];
+    if (i > 0) {
+      lastOpt = this.optionFor(args[i-1]);
+    }
+
+    if (arg === '--') {
+      // Honor option terminator
+      ret = ret.concat(args.slice(i));
+      break;
+    } else if (lastOpt && lastOpt.required) {
+      ret.push(arg);
+    } else if (arg.length > 1 && '-' == arg[0] && '-' != arg[1]) {
+      arg.slice(1).split('').forEach(function(c) {
+        ret.push('-' + c);
+      });
+    } else if (/^--/.test(arg) && ~(index = arg.indexOf('='))) {
+      ret.push(arg.slice(0, index), arg.slice(index + 1));
+    } else {
+      ret.push(arg);
+    }
+  }
+
+  return ret;
+};
+
+/**
+ * Parse command `args`.
+ *
+ * When listener(s) are available those
+ * callbacks are invoked, otherwise the "*"
+ * event is emitted and those actions are invoked.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api private
+ */
+
+Command.prototype.parseArgs = function(args, unknown) {
+  var name;
+
+  if (args.length) {
+    name = args[0];
+    if (this.listeners(name).length) {
+      this.emit(args.shift(), args, unknown);
+    } else {
+      this.emit('*', args);
+    }
+  } else {
+    outputHelpIfNecessary(this, unknown);
+
+    // If there were no args and we have unknown options,
+    // then they are extraneous and we need to error.
+    if (unknown.length > 0) {
+      this.unknownOption(unknown[0]);
+    }
+  }
+
+  return this;
+};
+
+/**
+ * Return an option matching `arg` if any.
+ *
+ * @param {String} arg
+ * @return {Option}
+ * @api private
+ */
+
+Command.prototype.optionFor = function(arg) {
+  for (var i = 0, len = this.options.length; i < len; ++i) {
+    if (this.options[i].is(arg)) {
+      return this.options[i];
+    }
+  }
+};
+
+/**
+ * Parse options from `argv` returning `argv`
+ * void of these options.
+ *
+ * @param {Array} argv
+ * @return {Array}
+ * @api public
+ */
+
+Command.prototype.parseOptions = function(argv) {
+  var args = []
+    , len = argv.length
+    , literal
+    , option
+    , arg;
+
+  var unknownOptions = [];
+
+  // parse options
+  for (var i = 0; i < len; ++i) {
+    arg = argv[i];
+
+    // literal args after --
+    if ('--' == arg) {
+      literal = true;
+      continue;
+    }
+
+    if (literal) {
+      args.push(arg);
+      continue;
+    }
+
+    // find matching Option
+    option = this.optionFor(arg);
+
+    // option is defined
+    if (option) {
+      // requires arg
+      if (option.required) {
+        arg = argv[++i];
+        if (null == arg) return this.optionMissingArgument(option);
+        this.emit(option.name(), arg);
+      // optional arg
+      } else if (option.optional) {
+        arg = argv[i+1];
+        if (null == arg || ('-' == arg[0] && '-' != arg)) {
+          arg = null;
+        } else {
+          ++i;
+        }
+        this.emit(option.name(), arg);
+      // bool
+      } else {
+        this.emit(option.name());
+      }
+      continue;
+    }
+
+    // looks like an option
+    if (arg.length > 1 && '-' == arg[0]) {
+      unknownOptions.push(arg);
+
+      // If the next argument looks like it might be
+      // an argument for this option, we pass it on.
+      // If it isn't, then it'll simply be ignored
+      if (argv[i+1] && '-' != argv[i+1][0]) {
+        unknownOptions.push(argv[++i]);
+      }
+      continue;
+    }
+
+    // arg
+    args.push(arg);
+  }
+
+  return { args: args, unknown: unknownOptions };
+};
+
+/**
+ * Return an object containing options as key-value pairs
+ *
+ * @return {Object}
+ * @api public
+ */
+Command.prototype.opts = function() {
+  var result = {}
+    , len = this.options.length;
+
+  for (var i = 0 ; i < len; i++) {
+    var key = camelcase(this.options[i].name());
+    result[key] = key === 'version' ? this._version : this[key];
+  }
+  return result;
+};
+
+/**
+ * Argument `name` is missing.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.missingArgument = function(name) {
+  console.error();
+  console.error("  error: missing required argument `%s'", name);
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * `Option` is missing an argument, but received `flag` or nothing.
+ *
+ * @param {String} option
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.optionMissingArgument = function(option, flag) {
+  console.error();
+  if (flag) {
+    console.error("  error: option `%s' argument missing, got `%s'", option.flags, flag);
+  } else {
+    console.error("  error: option `%s' argument missing", option.flags);
+  }
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * Unknown option `flag`.
+ *
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.unknownOption = function(flag) {
+  if (this._allowUnknownOption) return;
+  console.error();
+  console.error("  error: unknown option `%s'", flag);
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * Variadic argument with `name` is not the last argument as required.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.variadicArgNotLast = function(name) {
+  console.error();
+  console.error("  error: variadic arguments must be last `%s'", name);
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * Set the program version to `str`.
+ *
+ * This method auto-registers the "-V, --version" flag
+ * which will print the version number when passed.
+ *
+ * @param {String} str
+ * @param {String} flags
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.version = function(str, flags) {
+  if (0 == arguments.length) return this._version;
+  this._version = str;
+  flags = flags || '-V, --version';
+  this.option(flags, 'output the version number');
+  this.on('version', function() {
+    process.stdout.write(str + '\n');
+    process.exit(0);
+  });
+  return this;
+};
+
+/**
+ * Set the description to `str`.
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.description = function(str) {
+  if (0 === arguments.length) return this._description;
+  this._description = str;
+  return this;
+};
+
+/**
+ * Set an alias for the command
+ *
+ * @param {String} alias
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.alias = function(alias) {
+  if (0 == arguments.length) return this._alias;
+  this._alias = alias;
+  return this;
+};
+
+/**
+ * Set / get the command usage `str`.
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.usage = function(str) {
+  var args = this._args.map(function(arg) {
+    return humanReadableArgName(arg);
+  });
+
+  var usage = '[options]'
+    + (this.commands.length ? ' [command]' : '')
+    + (this._args.length ? ' ' + args.join(' ') : '');
+
+  if (0 == arguments.length) return this._usage || usage;
+  this._usage = str;
+
+  return this;
+};
+
+/**
+ * Get the name of the command
+ *
+ * @param {String} name
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.name = function() {
+  return this._name;
+};
+
+/**
+ * Return the largest option length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestOptionLength = function() {
+  return this.options.reduce(function(max, option) {
+    return Math.max(max, option.flags.length);
+  }, 0);
+};
+
+/**
+ * Return help for options.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.optionHelp = function() {
+  var width = this.largestOptionLength();
+
+  // Prepend the help information
+  return [pad('-h, --help', width) + '  ' + 'output usage information']
+      .concat(this.options.map(function(option) {
+        return pad(option.flags, width) + '  ' + option.description;
+      }))
+      .join('\n');
+};
+
+/**
+ * Return command help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.commandHelp = function() {
+  if (!this.commands.length) return '';
+
+  var commands = this.commands.filter(function(cmd) {
+    return !cmd._noHelp;
+  }).map(function(cmd) {
+    var args = cmd._args.map(function(arg) {
+      return humanReadableArgName(arg);
+    }).join(' ');
+
+    return [
+      cmd._name
+        + (cmd._alias ? '|' + cmd._alias : '')
+        + (cmd.options.length ? ' [options]' : '')
+        + ' ' + args
+      , cmd.description()
+    ];
+  });
+
+  var width = commands.reduce(function(max, command) {
+    return Math.max(max, command[0].length);
+  }, 0);
+
+  return [
+    ''
+    , '  Commands:'
+    , ''
+    , commands.map(function(cmd) {
+      var desc = cmd[1] ? '  ' + cmd[1] : '';
+      return pad(cmd[0], width) + desc;
+    }).join('\n').replace(/^/gm, '    ')
+    , ''
+  ].join('\n');
+};
+
+/**
+ * Return program help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.helpInformation = function() {
+  var desc = [];
+  if (this._description) {
+    desc = [
+      '  ' + this._description
+      , ''
+    ];
+  }
+
+  var cmdName = this._name;
+  if (this._alias) {
+    cmdName = cmdName + '|' + this._alias;
+  }
+  var usage = [
+    ''
+    ,'  Usage: ' + cmdName + ' ' + this.usage()
+    , ''
+  ];
+
+  var cmds = [];
+  var commandHelp = this.commandHelp();
+  if (commandHelp) cmds = [commandHelp];
+
+  var options = [
+    '  Options:'
+    , ''
+    , '' + this.optionHelp().replace(/^/gm, '    ')
+    , ''
+    , ''
+  ];
+
+  return usage
+    .concat(cmds)
+    .concat(desc)
+    .concat(options)
+    .join('\n');
+};
+
+/**
+ * Output help information for this command
+ *
+ * @api public
+ */
+
+Command.prototype.outputHelp = function(cb) {
+  if (!cb) {
+    cb = function(passthru) {
+      return passthru;
+    }
+  }
+  process.stdout.write(cb(this.helpInformation()));
+  this.emit('--help');
+};
+
+/**
+ * Output help information and exit.
+ *
+ * @api public
+ */
+
+Command.prototype.help = function(cb) {
+  this.outputHelp(cb);
+  process.exit();
+};
+
+/**
+ * Camel-case the given `flag`
+ *
+ * @param {String} flag
+ * @return {String}
+ * @api private
+ */
+
+function camelcase(flag) {
+  return flag.split('-').reduce(function(str, word) {
+    return str + word[0].toUpperCase() + word.slice(1);
+  });
+}
+
+/**
+ * Pad `str` to `width`.
+ *
+ * @param {String} str
+ * @param {Number} width
+ * @return {String}
+ * @api private
+ */
+
+function pad(str, width) {
+  var len = Math.max(0, width - str.length);
+  return str + Array(len + 1).join(' ');
+}
+
+/**
+ * Output help information if necessary
+ *
+ * @param {Command} command to output help for
+ * @param {Array} array of options to search for -h or --help
+ * @api private
+ */
+
+function outputHelpIfNecessary(cmd, options) {
+  options = options || [];
+  for (var i = 0; i < options.length; i++) {
+    if (options[i] == '--help' || options[i] == '-h') {
+      cmd.outputHelp();
+      process.exit(0);
+    }
+  }
+}
+
+/**
+ * Takes an argument an returns its human readable equivalent for help usage.
+ *
+ * @param {Object} arg
+ * @return {String}
+ * @api private
+ */
+
+function humanReadableArgName(arg) {
+  var nameOutput = arg.name + (arg.variadic === true ? '...' : '');
+
+  return arg.required
+    ? '<' + nameOutput + '>'
+    : '[' + nameOutput + ']'
+}
+
+// for versions before node v0.8 when there weren't `fs.existsSync`
+function exists(file) {
+  try {
+    if (fs.statSync(file).isFile()) {
+      return true;
+    }
+  } catch (e) {
+    return false;
+  }
+}
+
diff --git a/node_modules/html-minifier/node_modules/commander/package.json b/node_modules/html-minifier/node_modules/commander/package.json
new file mode 100644
index 000000000..77311492d
--- /dev/null
+++ b/node_modules/html-minifier/node_modules/commander/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "commander",
+  "version": "2.9.0",
+  "description": "the complete solution for node.js command-line programs",
+  "keywords": [
+    "command",
+    "option",
+    "parser"
+  ],
+  "author": "TJ Holowaychuk <tj@vision-media.ca>",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/tj/commander.js.git"
+  },
+  "devDependencies": {
+    "should": ">= 0.0.1",
+    "sinon": ">=1.17.1"
+  },
+  "scripts": {
+    "test": "make test"
+  },
+  "main": "index",
+  "engines": {
+    "node": ">= 0.6.x"
+  },
+  "files": [
+    "index.js"
+  ],
+  "dependencies": {
+    "graceful-readlink": ">= 1.0.0"
+  }
+}
diff --git a/node_modules/html-minifier/package.json b/node_modules/html-minifier/package.json
new file mode 100644
index 000000000..0bb9c717a
--- /dev/null
+++ b/node_modules/html-minifier/package.json
@@ -0,0 +1,88 @@
+{
+  "name": "html-minifier",
+  "description": "Highly configurable, well-tested, JavaScript-based HTML minifier.",
+  "version": "3.4.3",
+  "keywords": [
+    "cli",
+    "compress",
+    "compressor",
+    "css",
+    "html",
+    "htmlmin",
+    "javascript",
+    "min",
+    "minification",
+    "minifier",
+    "minify",
+    "optimize",
+    "optimizer",
+    "pack",
+    "packer",
+    "parse",
+    "parser",
+    "uglifier",
+    "uglify"
+  ],
+  "homepage": "http://kangax.github.io/html-minifier/",
+  "author": "Juriy \"kangax\" Zaytsev",
+  "maintainers": [
+    "Alex Lam <alexlamsl@gmail.com>",
+    "Juriy Zaytsev <kangax@gmail.com> (http://perfectionkills.com)"
+  ],
+  "contributors": [
+    "Gilmore Davidson (https://github.com/gilmoreorless)",
+    "Hugo Wetterberg <hugo@wetterberg.nu>",
+    "Zoltan Frombach <tssajo@gmail.com>"
+  ],
+  "license": "MIT",
+  "bin": {
+    "html-minifier": "./cli.js"
+  },
+  "main": "src/htmlminifier.js",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/kangax/html-minifier.git"
+  },
+  "bugs": {
+    "url": "https://github.com/kangax/html-minifier/issues"
+  },
+  "engines": {
+    "node": ">=4"
+  },
+  "scripts": {
+    "dist": "grunt dist",
+    "test": "grunt test"
+  },
+  "dependencies": {
+    "camel-case": "3.0.x",
+    "clean-css": "4.0.x",
+    "commander": "2.9.x",
+    "he": "1.1.x",
+    "ncname": "1.0.x",
+    "param-case": "2.1.x",
+    "relateurl": "0.2.x",
+    "uglify-js": "~2.8.22"
+  },
+  "devDependencies": {
+    "grunt": "1.0.x",
+    "grunt-browserify": "5.0.x",
+    "grunt-contrib-uglify": "2.3.x",
+    "gruntify-eslint": "3.1.x",
+    "phantomjs-prebuilt": "2.1.x",
+    "qunitjs": "2.x",
+    "uglify-to-browserify": "1.0.x"
+  },
+  "benchmarkDependencies": {
+    "brotli": "1.3.x",
+    "chalk": "1.1.x",
+    "cli-table": "0.3.x",
+    "lzma": "2.3.x",
+    "minimize": "2.1.x",
+    "progress": "2.0.x"
+  },
+  "files": [
+    "src/*.js",
+    "cli.js",
+    "sample-cli-config-file.conf"
+  ]
+}
diff --git a/node_modules/html-minifier/sample-cli-config-file.conf b/node_modules/html-minifier/sample-cli-config-file.conf
new file mode 100644
index 000000000..02ea6cd65
--- /dev/null
+++ b/node_modules/html-minifier/sample-cli-config-file.conf
@@ -0,0 +1,39 @@
+{
+  "caseSensitive": false,
+  "collapseBooleanAttributes": true,
+  "collapseInlineTagWhitespace": false,
+  "collapseWhitespace": true,
+  "conservativeCollapse": false,
+  "customAttrCollapse": ".*",
+  "decodeEntities": true,
+  "html5": true,
+  "ignoreCustomFragments": [
+    "<#[\\s\\S]*?#>",
+    "<%[\\s\\S]*?%>",
+    "<\\?[\\s\\S]*?\\?>"
+  ],
+  "includeAutoGeneratedTags": false,
+  "keepClosingSlash": false,
+  "maxLineLength": 0,
+  "minifyCSS": true,
+  "minifyJS": true,
+  "preserveLineBreaks": false,
+  "preventAttributesEscaping": false,
+  "processConditionalComments": true,
+  "processScripts": [
+    "text/html"
+  ],
+  "removeAttributeQuotes": true,
+  "removeComments": true,
+  "removeEmptyAttributes": true,
+  "removeEmptyElements": true,
+  "removeOptionalTags": true,
+  "removeRedundantAttributes": true,
+  "removeScriptTypeAttributes": true,
+  "removeStyleLinkTypeAttributes": true,
+  "removeTagWhitespace": true,
+  "sortAttributes": true,
+  "sortClassName": true,
+  "trimCustomFragments": true,
+  "useShortDoctype": true
+}
diff --git a/node_modules/html-minifier/src/htmlminifier.js b/node_modules/html-minifier/src/htmlminifier.js
new file mode 100644
index 000000000..f7917cd4a
--- /dev/null
+++ b/node_modules/html-minifier/src/htmlminifier.js
@@ -0,0 +1,1308 @@
+'use strict';
+
+var CleanCSS = require('clean-css');
+var decode = require('he').decode;
+var HTMLParser = require('./htmlparser').HTMLParser;
+var RelateUrl = require('relateurl');
+var TokenChain = require('./tokenchain');
+var UglifyJS = require('uglify-js');
+var utils = require('./utils');
+
+var trimWhitespace = String.prototype.trim ? function(str) {
+  if (typeof str !== 'string') {
+    return str;
+  }
+  return str.trim();
+} : function(str) {
+  if (typeof str !== 'string') {
+    return str;
+  }
+  return str.replace(/^\s+/, '').replace(/\s+$/, '');
+};
+
+function collapseWhitespaceAll(str) {
+  return str && str.replace(/\s+/g, function(spaces) {
+    return spaces === '\t' ? '\t' : spaces.replace(/(^|\xA0+)[^\xA0]+/g, '$1 ');
+  });
+}
+
+function collapseWhitespace(str, options, trimLeft, trimRight, collapseAll) {
+  var lineBreakBefore = '', lineBreakAfter = '';
+
+  if (options.preserveLineBreaks) {
+    str = str.replace(/^\s*?[\n\r]\s*/, function() {
+      lineBreakBefore = '\n';
+      return '';
+    }).replace(/\s*?[\n\r]\s*$/, function() {
+      lineBreakAfter = '\n';
+      return '';
+    });
+  }
+
+  if (trimLeft) {
+    str = str.replace(/^\s+/, function(spaces) {
+      var conservative = !lineBreakBefore && options.conservativeCollapse;
+      if (conservative && spaces === '\t') {
+        return '\t';
+      }
+      return spaces.replace(/^[^\xA0]+/, '').replace(/(\xA0+)[^\xA0]+/g, '$1 ') || (conservative ? ' ' : '');
+    });
+  }
+
+  if (trimRight) {
+    str = str.replace(/\s+$/, function(spaces) {
+      var conservative = !lineBreakAfter && options.conservativeCollapse;
+      if (conservative && spaces === '\t') {
+        return '\t';
+      }
+      return spaces.replace(/[^\xA0]+(\xA0+)/g, ' $1').replace(/[^\xA0]+$/, '') || (conservative ? ' ' : '');
+    });
+  }
+
+  if (collapseAll) {
+    // strip non space whitespace then compress spaces to one
+    str = collapseWhitespaceAll(str);
+  }
+
+  return lineBreakBefore + str + lineBreakAfter;
+}
+
+var createMapFromString = utils.createMapFromString;
+// non-empty tags that will maintain whitespace around them
+var inlineTags = createMapFromString('a,abbr,acronym,b,bdi,bdo,big,button,cite,code,del,dfn,em,font,i,ins,kbd,mark,math,nobr,q,rt,rp,s,samp,small,span,strike,strong,sub,sup,svg,time,tt,u,var');
+// non-empty tags that will maintain whitespace within them
+var inlineTextTags = createMapFromString('a,abbr,acronym,b,big,del,em,font,i,ins,kbd,mark,nobr,s,samp,small,span,strike,strong,sub,sup,time,tt,u,var');
+// self-closing tags that will maintain whitespace around them
+var selfClosingInlineTags = createMapFromString('comment,img,input,wbr');
+
+function collapseWhitespaceSmart(str, prevTag, nextTag, options) {
+  var trimLeft = prevTag && !selfClosingInlineTags(prevTag);
+  if (trimLeft && !options.collapseInlineTagWhitespace) {
+    trimLeft = prevTag.charAt(0) === '/' ? !inlineTags(prevTag.slice(1)) : !inlineTextTags(prevTag);
+  }
+  var trimRight = nextTag && !selfClosingInlineTags(nextTag);
+  if (trimRight && !options.collapseInlineTagWhitespace) {
+    trimRight = nextTag.charAt(0) === '/' ? !inlineTextTags(nextTag.slice(1)) : !inlineTags(nextTag);
+  }
+  return collapseWhitespace(str, options, trimLeft, trimRight, prevTag && nextTag);
+}
+
+function isConditionalComment(text) {
+  return /^\[if\s[^\]]+]|\[endif]$/.test(text);
+}
+
+function isIgnoredComment(text, options) {
+  for (var i = 0, len = options.ignoreCustomComments.length; i < len; i++) {
+    if (options.ignoreCustomComments[i].test(text)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+function isEventAttribute(attrName, options) {
+  var patterns = options.customEventAttributes;
+  if (patterns) {
+    for (var i = patterns.length; i--;) {
+      if (patterns[i].test(attrName)) {
+        return true;
+      }
+    }
+    return false;
+  }
+  return /^on[a-z]{3,}$/.test(attrName);
+}
+
+function canRemoveAttributeQuotes(value) {
+  // http://mathiasbynens.be/notes/unquoted-attribute-values
+  return /^[^ \t\n\f\r"'`=<>]+$/.test(value);
+}
+
+function attributesInclude(attributes, attribute) {
+  for (var i = attributes.length; i--;) {
+    if (attributes[i].name.toLowerCase() === attribute) {
+      return true;
+    }
+  }
+  return false;
+}
+
+function isAttributeRedundant(tag, attrName, attrValue, attrs) {
+  attrValue = attrValue ? trimWhitespace(attrValue.toLowerCase()) : '';
+
+  return (
+      tag === 'script' &&
+      attrName === 'language' &&
+      attrValue === 'javascript' ||
+
+      tag === 'form' &&
+      attrName === 'method' &&
+      attrValue === 'get' ||
+
+      tag === 'input' &&
+      attrName === 'type' &&
+      attrValue === 'text' ||
+
+      tag === 'script' &&
+      attrName === 'charset' &&
+      !attributesInclude(attrs, 'src') ||
+
+      tag === 'a' &&
+      attrName === 'name' &&
+      attributesInclude(attrs, 'id') ||
+
+      tag === 'area' &&
+      attrName === 'shape' &&
+      attrValue === 'rect'
+  );
+}
+
+// https://mathiasbynens.be/demo/javascript-mime-type
+// https://developer.mozilla.org/en/docs/Web/HTML/Element/script#attr-type
+var executableScriptsMimetypes = utils.createMap([
+  'text/javascript',
+  'text/ecmascript',
+  'text/jscript',
+  'application/javascript',
+  'application/x-javascript',
+  'application/ecmascript'
+]);
+
+function isScriptTypeAttribute(attrValue) {
+  attrValue = trimWhitespace(attrValue.split(/;/, 2)[0]).toLowerCase();
+  return attrValue === '' || executableScriptsMimetypes(attrValue);
+}
+
+function isExecutableScript(tag, attrs) {
+  if (tag !== 'script') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    var attrName = attrs[i].name.toLowerCase();
+    if (attrName === 'type') {
+      return isScriptTypeAttribute(attrs[i].value);
+    }
+  }
+  return true;
+}
+
+function isStyleLinkTypeAttribute(attrValue) {
+  attrValue = trimWhitespace(attrValue).toLowerCase();
+  return attrValue === '' || attrValue === 'text/css';
+}
+
+function isStyleSheet(tag, attrs) {
+  if (tag !== 'style') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    var attrName = attrs[i].name.toLowerCase();
+    if (attrName === 'type') {
+      return isStyleLinkTypeAttribute(attrs[i].value);
+    }
+  }
+  return true;
+}
+
+var isSimpleBoolean = createMapFromString('allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,default,defaultchecked,defaultmuted,defaultselected,defer,disabled,enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,required,reversed,scoped,seamless,selected,sortable,truespeed,typemustmatch,visible');
+var isBooleanValue = createMapFromString('true,false');
+
+function isBooleanAttribute(attrName, attrValue) {
+  return isSimpleBoolean(attrName) || attrName === 'draggable' && !isBooleanValue(attrValue);
+}
+
+function isUriTypeAttribute(attrName, tag) {
+  return (
+    /^(?:a|area|link|base)$/.test(tag) && attrName === 'href' ||
+    tag === 'img' && /^(?:src|longdesc|usemap)$/.test(attrName) ||
+    tag === 'object' && /^(?:classid|codebase|data|usemap)$/.test(attrName) ||
+    tag === 'q' && attrName === 'cite' ||
+    tag === 'blockquote' && attrName === 'cite' ||
+    (tag === 'ins' || tag === 'del') && attrName === 'cite' ||
+    tag === 'form' && attrName === 'action' ||
+    tag === 'input' && (attrName === 'src' || attrName === 'usemap') ||
+    tag === 'head' && attrName === 'profile' ||
+    tag === 'script' && (attrName === 'src' || attrName === 'for')
+  );
+}
+
+function isNumberTypeAttribute(attrName, tag) {
+  return (
+    /^(?:a|area|object|button)$/.test(tag) && attrName === 'tabindex' ||
+    tag === 'input' && (attrName === 'maxlength' || attrName === 'tabindex') ||
+    tag === 'select' && (attrName === 'size' || attrName === 'tabindex') ||
+    tag === 'textarea' && /^(?:rows|cols|tabindex)$/.test(attrName) ||
+    tag === 'colgroup' && attrName === 'span' ||
+    tag === 'col' && attrName === 'span' ||
+    (tag === 'th' || tag === 'td') && (attrName === 'rowspan' || attrName === 'colspan')
+  );
+}
+
+function isLinkType(tag, attrs, value) {
+  if (tag !== 'link') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    if (attrs[i].name === 'rel' && attrs[i].value === value) {
+      return true;
+    }
+  }
+}
+
+function isMediaQuery(tag, attrs, attrName) {
+  return attrName === 'media' && (isLinkType(tag, attrs, 'stylesheet') || isStyleSheet(tag, attrs));
+}
+
+var srcsetTags = createMapFromString('img,source');
+
+function isSrcset(attrName, tag) {
+  return attrName === 'srcset' && srcsetTags(tag);
+}
+
+function cleanAttributeValue(tag, attrName, attrValue, options, attrs) {
+  if (attrValue && isEventAttribute(attrName, options)) {
+    attrValue = trimWhitespace(attrValue).replace(/^javascript:\s*/i, '');
+    return options.minifyJS(attrValue, true);
+  }
+  else if (attrName === 'class') {
+    attrValue = trimWhitespace(attrValue);
+    if (options.sortClassName) {
+      attrValue = options.sortClassName(attrValue);
+    }
+    else {
+      attrValue = collapseWhitespaceAll(attrValue);
+    }
+    return attrValue;
+  }
+  else if (isUriTypeAttribute(attrName, tag)) {
+    attrValue = trimWhitespace(attrValue);
+    return isLinkType(tag, attrs, 'canonical') ? attrValue : options.minifyURLs(attrValue);
+  }
+  else if (isNumberTypeAttribute(attrName, tag)) {
+    return trimWhitespace(attrValue);
+  }
+  else if (attrName === 'style') {
+    attrValue = trimWhitespace(attrValue);
+    if (attrValue) {
+      if (/;$/.test(attrValue) && !/&#?[0-9a-zA-Z]+;$/.test(attrValue)) {
+        attrValue = attrValue.replace(/\s*;$/, '');
+      }
+      attrValue = unwrapInlineCSS(options.minifyCSS(wrapInlineCSS(attrValue)));
+    }
+    return attrValue;
+  }
+  else if (isSrcset(attrName, tag)) {
+    // https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-srcset
+    attrValue = trimWhitespace(attrValue).split(/\s+,\s*|\s*,\s+/).map(function(candidate) {
+      var url = candidate;
+      var descriptor = '';
+      var match = candidate.match(/\s+([1-9][0-9]*w|[0-9]+(?:\.[0-9]+)?x)$/);
+      if (match) {
+        url = url.slice(0, -match[0].length);
+        var num = +match[1].slice(0, -1);
+        var suffix = match[1].slice(-1);
+        if (num !== 1 || suffix !== 'x') {
+          descriptor = ' ' + num + suffix;
+        }
+      }
+      return options.minifyURLs(url) + descriptor;
+    }).join(', ');
+  }
+  else if (isMetaViewport(tag, attrs) && attrName === 'content') {
+    attrValue = attrValue.replace(/\s+/g, '').replace(/[0-9]+\.[0-9]+/g, function(numString) {
+      // "0.90000" -> "0.9"
+      // "1.0" -> "1"
+      // "1.0001" -> "1.0001" (unchanged)
+      return (+numString).toString();
+    });
+  }
+  else if (attrValue && options.customAttrCollapse && options.customAttrCollapse.test(attrName)) {
+    attrValue = attrValue.replace(/\n+|\r+|\s{2,}/g, '');
+  }
+  else if (tag === 'script' && attrName === 'type') {
+    attrValue = trimWhitespace(attrValue.replace(/\s*;\s*/g, ';'));
+  }
+  else if (isMediaQuery(tag, attrs, attrName)) {
+    attrValue = trimWhitespace(attrValue);
+    return unwrapMediaQuery(options.minifyCSS(wrapMediaQuery(attrValue)));
+  }
+  return attrValue;
+}
+
+function isMetaViewport(tag, attrs) {
+  if (tag !== 'meta') {
+    return false;
+  }
+  for (var i = 0, len = attrs.length; i < len; i++) {
+    if (attrs[i].name === 'name' && attrs[i].value === 'viewport') {
+      return true;
+    }
+  }
+}
+
+// Wrap CSS declarations for CleanCSS > 3.x
+// See https://github.com/jakubpawlowicz/clean-css/issues/418
+function wrapInlineCSS(text) {
+  return '*{' + text + '}';
+}
+
+function unwrapInlineCSS(text) {
+  var matches = text.match(/^\*\{([\s\S]*)\}$/);
+  return matches ? matches[1] : text;
+}
+
+function wrapMediaQuery(text) {
+  return '@media ' + text + '{a{top:0}}';
+}
+
+function unwrapMediaQuery(text) {
+  var matches = text.match(/^@media ([\s\S]*?)\s*{[\s\S]*}$/);
+  return matches ? matches[1] : text;
+}
+
+function cleanConditionalComment(comment, options) {
+  return options.processConditionalComments ? comment.replace(/^(\[if\s[^\]]+]>)([\s\S]*?)(<!\[endif])$/, function(match, prefix, text, suffix) {
+    return prefix + minify(text, options, true) + suffix;
+  }) : comment;
+}
+
+function processScript(text, options, currentAttrs) {
+  for (var i = 0, len = currentAttrs.length; i < len; i++) {
+    if (currentAttrs[i].name.toLowerCase() === 'type' &&
+        options.processScripts.indexOf(currentAttrs[i].value) > -1) {
+      return minify(text, options);
+    }
+  }
+  return text;
+}
+
+// Tag omission rules from https://html.spec.whatwg.org/multipage/syntax.html#optional-tags
+// with the following deviations:
+// - retain <body> if followed by <noscript>
+// - </rb>, </rt>, </rtc>, </rp> & </tfoot> follow http://www.w3.org/TR/html5/syntax.html#optional-tags
+// - retain all tags which are adjacent to non-standard HTML tags
+var optionalStartTags = createMapFromString('html,head,body,colgroup,tbody');
+var optionalEndTags = createMapFromString('html,head,body,li,dt,dd,p,rb,rt,rtc,rp,optgroup,option,colgroup,caption,thead,tbody,tfoot,tr,td,th');
+var headerTags = createMapFromString('meta,link,script,style,template,noscript');
+var descriptionTags = createMapFromString('dt,dd');
+var pBlockTags = createMapFromString('address,article,aside,blockquote,details,div,dl,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,hr,main,menu,nav,ol,p,pre,section,table,ul');
+var pInlineTags = createMapFromString('a,audio,del,ins,map,noscript,video');
+var rubyTags = createMapFromString('rb,rt,rtc,rp');
+var rtcTag = createMapFromString('rb,rtc,rp');
+var optionTag = createMapFromString('option,optgroup');
+var tableContentTags = createMapFromString('tbody,tfoot');
+var tableSectionTags = createMapFromString('thead,tbody,tfoot');
+var cellTags = createMapFromString('td,th');
+var topLevelTags = createMapFromString('html,head,body');
+var compactTags = createMapFromString('html,body');
+var looseTags = createMapFromString('head,colgroup,caption');
+var trailingTags = createMapFromString('dt,thead');
+var htmlTags = createMapFromString('a,abbr,acronym,address,applet,area,article,aside,audio,b,base,basefont,bdi,bdo,bgsound,big,blink,blockquote,body,br,button,canvas,caption,center,cite,code,col,colgroup,command,content,data,datalist,dd,del,details,dfn,dialog,dir,div,dl,dt,element,em,embed,fieldset,figcaption,figure,font,footer,form,frame,frameset,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,i,iframe,image,img,input,ins,isindex,kbd,keygen,label,legend,li,link,listing,main,map,mark,marquee,menu,menuitem,meta,meter,multicol,nav,nobr,noembed,noframes,noscript,object,ol,optgroup,option,output,p,param,picture,plaintext,pre,progress,q,rp,rt,rtc,ruby,s,samp,script,section,select,shadow,small,source,spacer,span,strike,strong,style,sub,summary,sup,table,tbody,td,template,textarea,tfoot,th,thead,time,title,tr,track,tt,u,ul,var,video,wbr,xmp');
+
+function canRemoveParentTag(optionalStartTag, tag) {
+  switch (optionalStartTag) {
+    case 'html':
+    case 'head':
+      return true;
+    case 'body':
+      return !headerTags(tag);
+    case 'colgroup':
+      return tag === 'col';
+    case 'tbody':
+      return tag === 'tr';
+  }
+  return false;
+}
+
+function isStartTagMandatory(optionalEndTag, tag) {
+  switch (tag) {
+    case 'colgroup':
+      return optionalEndTag === 'colgroup';
+    case 'tbody':
+      return tableSectionTags(optionalEndTag);
+  }
+  return false;
+}
+
+function canRemovePrecedingTag(optionalEndTag, tag) {
+  switch (optionalEndTag) {
+    case 'html':
+    case 'head':
+    case 'body':
+    case 'colgroup':
+    case 'caption':
+      return true;
+    case 'li':
+    case 'optgroup':
+    case 'tr':
+      return tag === optionalEndTag;
+    case 'dt':
+    case 'dd':
+      return descriptionTags(tag);
+    case 'p':
+      return pBlockTags(tag);
+    case 'rb':
+    case 'rt':
+    case 'rp':
+      return rubyTags(tag);
+    case 'rtc':
+      return rtcTag(tag);
+    case 'option':
+      return optionTag(tag);
+    case 'thead':
+    case 'tbody':
+      return tableContentTags(tag);
+    case 'tfoot':
+      return tag === 'tbody';
+    case 'td':
+    case 'th':
+      return cellTags(tag);
+  }
+  return false;
+}
+
+var reEmptyAttribute = new RegExp(
+  '^(?:class|id|style|title|lang|dir|on(?:focus|blur|change|click|dblclick|mouse(' +
+    '?:down|up|over|move|out)|key(?:press|down|up)))$');
+
+function canDeleteEmptyAttribute(tag, attrName, attrValue, options) {
+  var isValueEmpty = !attrValue || /^\s*$/.test(attrValue);
+  if (!isValueEmpty) {
+    return false;
+  }
+  if (typeof options.removeEmptyAttributes === 'function') {
+    return options.removeEmptyAttributes(attrName, tag);
+  }
+  return tag === 'input' && attrName === 'value' || reEmptyAttribute.test(attrName);
+}
+
+function hasAttrName(name, attrs) {
+  for (var i = attrs.length - 1; i >= 0; i--) {
+    if (attrs[i].name === name) {
+      return true;
+    }
+  }
+  return false;
+}
+
+function canRemoveElement(tag, attrs) {
+  switch (tag) {
+    case 'textarea':
+      return false;
+    case 'audio':
+    case 'script':
+    case 'video':
+      if (hasAttrName('src', attrs)) {
+        return false;
+      }
+      break;
+    case 'iframe':
+      if (hasAttrName('src', attrs) || hasAttrName('srcdoc', attrs)) {
+        return false;
+      }
+      break;
+    case 'object':
+      if (hasAttrName('data', attrs)) {
+        return false;
+      }
+      break;
+    case 'applet':
+      if (hasAttrName('code', attrs)) {
+        return false;
+      }
+      break;
+  }
+  return true;
+}
+
+function canCollapseWhitespace(tag) {
+  return !/^(?:script|style|pre|textarea)$/.test(tag);
+}
+
+function canTrimWhitespace(tag) {
+  return !/^(?:pre|textarea)$/.test(tag);
+}
+
+function normalizeAttr(attr, attrs, tag, options) {
+  var attrName = options.caseSensitive ? attr.name : attr.name.toLowerCase(),
+      attrValue = attr.value;
+
+  if (options.decodeEntities && attrValue) {
+    attrValue = decode(attrValue, { isAttributeValue: true });
+  }
+
+  if (options.removeRedundantAttributes &&
+    isAttributeRedundant(tag, attrName, attrValue, attrs) ||
+    options.removeScriptTypeAttributes && tag === 'script' &&
+    attrName === 'type' && isScriptTypeAttribute(attrValue) ||
+    options.removeStyleLinkTypeAttributes && (tag === 'style' || tag === 'link') &&
+    attrName === 'type' && isStyleLinkTypeAttribute(attrValue)) {
+    return;
+  }
+
+  attrValue = cleanAttributeValue(tag, attrName, attrValue, options, attrs);
+
+  if (options.removeEmptyAttributes &&
+      canDeleteEmptyAttribute(tag, attrName, attrValue, options)) {
+    return;
+  }
+
+  if (options.decodeEntities && attrValue) {
+    attrValue = attrValue.replace(/&(#?[0-9a-zA-Z]+;)/g, '&amp;$1');
+  }
+
+  return {
+    attr: attr,
+    name: attrName,
+    value: attrValue
+  };
+}
+
+function buildAttr(normalized, hasUnarySlash, options, isLast, uidAttr) {
+  var attrName = normalized.name,
+      attrValue = normalized.value,
+      attr = normalized.attr,
+      attrQuote = attr.quote,
+      attrFragment,
+      emittedAttrValue;
+
+  if (typeof attrValue !== 'undefined' && (!options.removeAttributeQuotes ||
+      ~attrValue.indexOf(uidAttr) || !canRemoveAttributeQuotes(attrValue))) {
+    if (!options.preventAttributesEscaping) {
+      if (typeof options.quoteCharacter === 'undefined') {
+        var apos = (attrValue.match(/'/g) || []).length;
+        var quot = (attrValue.match(/"/g) || []).length;
+        attrQuote = apos < quot ? '\'' : '"';
+      }
+      else {
+        attrQuote = options.quoteCharacter === '\'' ? '\'' : '"';
+      }
+      if (attrQuote === '"') {
+        attrValue = attrValue.replace(/"/g, '&#34;');
+      }
+      else {
+        attrValue = attrValue.replace(/'/g, '&#39;');
+      }
+    }
+    emittedAttrValue = attrQuote + attrValue + attrQuote;
+    if (!isLast && !options.removeTagWhitespace) {
+      emittedAttrValue += ' ';
+    }
+  }
+  // make sure trailing slash is not interpreted as HTML self-closing tag
+  else if (isLast && !hasUnarySlash && !/\/$/.test(attrValue)) {
+    emittedAttrValue = attrValue;
+  }
+  else {
+    emittedAttrValue = attrValue + ' ';
+  }
+
+  if (typeof attrValue === 'undefined' || options.collapseBooleanAttributes &&
+      isBooleanAttribute(attrName.toLowerCase(), attrValue.toLowerCase())) {
+    attrFragment = attrName;
+    if (!isLast) {
+      attrFragment += ' ';
+    }
+  }
+  else {
+    attrFragment = attrName + attr.customAssign + emittedAttrValue;
+  }
+
+  return attr.customOpen + attrFragment + attr.customClose;
+}
+
+function identity(value) {
+  return value;
+}
+
+function processOptions(options) {
+  ['html5', 'includeAutoGeneratedTags'].forEach(function(key) {
+    if (!(key in options)) {
+      options[key] = true;
+    }
+  });
+
+  if (typeof options.log !== 'function') {
+    options.log = identity;
+  }
+
+  var defaultTesters = ['canCollapseWhitespace', 'canTrimWhitespace'];
+  for (var i = 0, len = defaultTesters.length; i < len; i++) {
+    if (!options[defaultTesters[i]]) {
+      options[defaultTesters[i]] = function() {
+        return false;
+      };
+    }
+  }
+
+  if (!('ignoreCustomComments' in options)) {
+    options.ignoreCustomComments = [/^!/];
+  }
+
+  if (!('ignoreCustomFragments' in options)) {
+    options.ignoreCustomFragments = [
+      /<%[\s\S]*?%>/,
+      /<\?[\s\S]*?\?>/
+    ];
+  }
+
+  if (!options.minifyURLs) {
+    options.minifyURLs = identity;
+  }
+  if (typeof options.minifyURLs !== 'function') {
+    var minifyURLs = options.minifyURLs;
+    if (typeof minifyURLs === 'string') {
+      minifyURLs = { site: minifyURLs };
+    }
+    else if (typeof minifyURLs !== 'object') {
+      minifyURLs = {};
+    }
+    options.minifyURLs = function(text) {
+      try {
+        return RelateUrl.relate(text, minifyURLs);
+      }
+      catch (err) {
+        options.log(err);
+        return text;
+      }
+    };
+  }
+
+  if (!options.minifyJS) {
+    options.minifyJS = identity;
+  }
+  if (typeof options.minifyJS !== 'function') {
+    var minifyJS = options.minifyJS;
+    if (typeof minifyJS !== 'object') {
+      minifyJS = {};
+    }
+    minifyJS.fromString = true;
+    (minifyJS.parse || (minifyJS.parse = {})).bare_returns = false;
+    options.minifyJS = function(text, inline) {
+      var start = text.match(/^\s*<!--.*/);
+      var code = start ? text.slice(start[0].length).replace(/\n\s*-->\s*$/, '') : text;
+      try {
+        minifyJS.parse.bare_returns = inline;
+        code = UglifyJS.minify(code, minifyJS).code;
+        if (/;$/.test(code)) {
+          code = code.slice(0, -1);
+        }
+        return code;
+      }
+      catch (err) {
+        options.log(err);
+        return text;
+      }
+    };
+  }
+
+  if (!options.minifyCSS) {
+    options.minifyCSS = identity;
+  }
+  if (typeof options.minifyCSS !== 'function') {
+    var minifyCSS = options.minifyCSS;
+    if (typeof minifyCSS !== 'object') {
+      minifyCSS = {};
+    }
+    options.minifyCSS = function(text) {
+      text = text.replace(/(url\s*\(\s*)("|'|)(.*?)\2(\s*\))/ig, function(match, prefix, quote, url, suffix) {
+        return prefix + quote + options.minifyURLs(url) + quote + suffix;
+      });
+      try {
+        return new CleanCSS(minifyCSS).minify(text).styles;
+      }
+      catch (err) {
+        options.log(err);
+        return text;
+      }
+    };
+  }
+}
+
+function uniqueId(value) {
+  var id;
+  do {
+    id = Math.random().toString(36).replace(/^0\.[0-9]*/, '');
+  } while (~value.indexOf(id));
+  return id;
+}
+
+var specialContentTags = createMapFromString('script,style');
+
+function createSortFns(value, options, uidIgnore, uidAttr) {
+  var attrChains = options.sortAttributes && Object.create(null);
+  var classChain = options.sortClassName && new TokenChain();
+
+  function attrNames(attrs) {
+    return attrs.map(function(attr) {
+      return options.caseSensitive ? attr.name : attr.name.toLowerCase();
+    });
+  }
+
+  function shouldSkipUID(token, uid) {
+    return !uid || token.indexOf(uid) === -1;
+  }
+
+  function shouldSkipUIDs(token) {
+    return shouldSkipUID(token, uidIgnore) && shouldSkipUID(token, uidAttr);
+  }
+
+  function scan(input) {
+    var currentTag, currentType;
+    new HTMLParser(input, {
+      start: function(tag, attrs) {
+        if (attrChains) {
+          if (!attrChains[tag]) {
+            attrChains[tag] = new TokenChain();
+          }
+          attrChains[tag].add(attrNames(attrs).filter(shouldSkipUIDs));
+        }
+        for (var i = 0, len = attrs.length; i < len; i++) {
+          var attr = attrs[i];
+          if (classChain && (options.caseSensitive ? attr.name : attr.name.toLowerCase()) === 'class') {
+            classChain.add(trimWhitespace(attr.value).split(/\s+/).filter(shouldSkipUIDs));
+          }
+          else if (options.processScripts && attr.name.toLowerCase() === 'type') {
+            currentTag = tag;
+            currentType = attr.value;
+          }
+        }
+      },
+      end: function() {
+        currentTag = '';
+      },
+      chars: function(text) {
+        if (options.processScripts && specialContentTags(currentTag) &&
+            options.processScripts.indexOf(currentType) > -1) {
+          scan(text);
+        }
+      }
+    });
+  }
+
+  var log = options.log;
+  options.log = null;
+  options.sortAttributes = false;
+  options.sortClassName = false;
+  scan(minify(value, options));
+  options.log = log;
+  if (attrChains) {
+    var attrSorters = Object.create(null);
+    for (var tag in attrChains) {
+      attrSorters[tag] = attrChains[tag].createSorter();
+    }
+    options.sortAttributes = function(tag, attrs) {
+      var sorter = attrSorters[tag];
+      if (sorter) {
+        var attrMap = Object.create(null);
+        var names = attrNames(attrs);
+        names.forEach(function(name, index) {
+          (attrMap[name] || (attrMap[name] = [])).push(attrs[index]);
+        });
+        sorter.sort(names).forEach(function(name, index) {
+          attrs[index] = attrMap[name].shift();
+        });
+      }
+    };
+  }
+  if (classChain) {
+    var sorter = classChain.createSorter();
+    options.sortClassName = function(value) {
+      return sorter.sort(value.split(/\s+/)).join(' ');
+    };
+  }
+}
+
+function minify(value, options, partialMarkup) {
+  options = options || {};
+  var optionsStack = [];
+  processOptions(options);
+  if (options.collapseWhitespace) {
+    value = collapseWhitespace(value, options, true, true);
+  }
+
+  var buffer = [],
+      charsPrevTag,
+      currentChars = '',
+      hasChars,
+      currentTag = '',
+      currentAttrs = [],
+      stackNoTrimWhitespace = [],
+      stackNoCollapseWhitespace = [],
+      optionalStartTag = '',
+      optionalEndTag = '',
+      t = Date.now(),
+      ignoredMarkupChunks = [],
+      ignoredCustomMarkupChunks = [],
+      uidIgnore,
+      uidAttr,
+      uidPattern;
+
+  // temporarily replace ignored chunks with comments,
+  // so that we don't have to worry what's there.
+  // for all we care there might be
+  // completely-horribly-broken-alien-non-html-emoj-cthulhu-filled content
+  value = value.replace(/<!-- htmlmin:ignore -->([\s\S]*?)<!-- htmlmin:ignore -->/g, function(match, group1) {
+    if (!uidIgnore) {
+      uidIgnore = uniqueId(value);
+      var pattern = new RegExp('^' + uidIgnore + '([0-9]+)$');
+      if (options.ignoreCustomComments) {
+        options.ignoreCustomComments.push(pattern);
+      }
+      else {
+        options.ignoreCustomComments = [pattern];
+      }
+    }
+    var token = '<!--' + uidIgnore + ignoredMarkupChunks.length + '-->';
+    ignoredMarkupChunks.push(group1);
+    return token;
+  });
+
+  function escapeFragments(text) {
+    return text.replace(uidPattern, function(match, prefix, index) {
+      var chunks = ignoredCustomMarkupChunks[+index];
+      return chunks[1] + uidAttr + index + chunks[2];
+    });
+  }
+
+  var customFragments = options.ignoreCustomFragments.map(function(re) {
+    return re.source;
+  });
+  if (customFragments.length) {
+    var reCustomIgnore = new RegExp('\\s*(?:' + customFragments.join('|') + ')+\\s*', 'g');
+    // temporarily replace custom ignored fragments with unique attributes
+    value = value.replace(reCustomIgnore, function(match) {
+      if (!uidAttr) {
+        uidAttr = uniqueId(value);
+        uidPattern = new RegExp('(\\s*)' + uidAttr + '([0-9]+)(\\s*)', 'g');
+        var minifyCSS = options.minifyCSS;
+        if (minifyCSS) {
+          options.minifyCSS = function(text) {
+            return minifyCSS(escapeFragments(text));
+          };
+        }
+        var minifyJS = options.minifyJS;
+        if (minifyJS) {
+          options.minifyJS = function(text, inline) {
+            return minifyJS(escapeFragments(text), inline);
+          };
+        }
+      }
+      var token = uidAttr + ignoredCustomMarkupChunks.length;
+      ignoredCustomMarkupChunks.push(/^(\s*)[\s\S]*?(\s*)$/.exec(match));
+      return '\t' + token + '\t';
+    });
+  }
+
+  if (options.sortAttributes && typeof options.sortAttributes !== 'function' ||
+      options.sortClassName && typeof options.sortClassName !== 'function') {
+    createSortFns(value, options, uidIgnore, uidAttr);
+  }
+
+  function _canCollapseWhitespace(tag, attrs) {
+    return canCollapseWhitespace(tag) || options.canCollapseWhitespace(tag, attrs);
+  }
+
+  function _canTrimWhitespace(tag, attrs) {
+    return canTrimWhitespace(tag) || options.canTrimWhitespace(tag, attrs);
+  }
+
+  function removeStartTag() {
+    var index = buffer.length - 1;
+    while (index > 0 && !/^<[^/!]/.test(buffer[index])) {
+      index--;
+    }
+    buffer.length = Math.max(0, index);
+  }
+
+  function removeEndTag() {
+    var index = buffer.length - 1;
+    while (index > 0 && !/^<\//.test(buffer[index])) {
+      index--;
+    }
+    buffer.length = Math.max(0, index);
+  }
+
+  // look for trailing whitespaces, bypass any inline tags
+  function trimTrailingWhitespace(index, nextTag) {
+    for (var endTag = null; index >= 0 && _canTrimWhitespace(endTag); index--) {
+      var str = buffer[index];
+      var match = str.match(/^<\/([\w:-]+)>$/);
+      if (match) {
+        endTag = match[1];
+      }
+      else if (/>$/.test(str) || (buffer[index] = collapseWhitespaceSmart(str, null, nextTag, options))) {
+        break;
+      }
+    }
+  }
+
+  // look for trailing whitespaces from previously processed text
+  // which may not be trimmed due to a following comment or an empty
+  // element which has now been removed
+  function squashTrailingWhitespace(nextTag) {
+    var charsIndex = buffer.length - 1;
+    if (buffer.length > 1) {
+      var item = buffer[buffer.length - 1];
+      if (/^(?:<!|$)/.test(item) && item.indexOf(uidIgnore) === -1) {
+        charsIndex--;
+      }
+    }
+    trimTrailingWhitespace(charsIndex, nextTag);
+  }
+
+  new HTMLParser(value, {
+    partialMarkup: partialMarkup,
+    html5: options.html5,
+
+    start: function(tag, attrs, unary, unarySlash, autoGenerated) {
+      var lowerTag = tag.toLowerCase();
+
+      if (lowerTag === 'svg') {
+        optionsStack.push(options);
+        var nextOptions = {};
+        for (var key in options) {
+          nextOptions[key] = options[key];
+        }
+        nextOptions.keepClosingSlash = true;
+        nextOptions.caseSensitive = true;
+        options = nextOptions;
+      }
+
+      tag = options.caseSensitive ? tag : lowerTag;
+
+      currentTag = tag;
+      charsPrevTag = tag;
+      if (!inlineTextTags(tag)) {
+        currentChars = '';
+      }
+      hasChars = false;
+      currentAttrs = attrs;
+
+      var optional = options.removeOptionalTags;
+      if (optional) {
+        var htmlTag = htmlTags(tag);
+        // <html> may be omitted if first thing inside is not comment
+        // <head> may be omitted if first thing inside is an element
+        // <body> may be omitted if first thing inside is not space, comment, <meta>, <link>, <script>, <style> or <template>
+        // <colgroup> may be omitted if first thing inside is <col>
+        // <tbody> may be omitted if first thing inside is <tr>
+        if (htmlTag && canRemoveParentTag(optionalStartTag, tag)) {
+          removeStartTag();
+        }
+        optionalStartTag = '';
+        // end-tag-followed-by-start-tag omission rules
+        if (htmlTag && canRemovePrecedingTag(optionalEndTag, tag)) {
+          removeEndTag();
+          // <colgroup> cannot be omitted if preceding </colgroup> is omitted
+          // <tbody> cannot be omitted if preceding </tbody>, </thead> or </tfoot> is omitted
+          optional = !isStartTagMandatory(optionalEndTag, tag);
+        }
+        optionalEndTag = '';
+      }
+
+      // set whitespace flags for nested tags (eg. <code> within a <pre>)
+      if (options.collapseWhitespace) {
+        if (!stackNoTrimWhitespace.length) {
+          squashTrailingWhitespace(tag);
+        }
+        if (!_canTrimWhitespace(tag, attrs)) {
+          stackNoTrimWhitespace.push(tag);
+        }
+        if (!_canCollapseWhitespace(tag, attrs)) {
+          stackNoCollapseWhitespace.push(tag);
+        }
+      }
+
+      var openTag = '<' + tag;
+      var hasUnarySlash = unarySlash && options.keepClosingSlash;
+
+      buffer.push(openTag);
+
+      if (options.sortAttributes) {
+        options.sortAttributes(tag, attrs);
+      }
+
+      var parts = [];
+      for (var i = attrs.length, isLast = true; --i >= 0;) {
+        var normalized = normalizeAttr(attrs[i], attrs, tag, options);
+        if (normalized) {
+          parts.unshift(buildAttr(normalized, hasUnarySlash, options, isLast, uidAttr));
+          isLast = false;
+        }
+      }
+      if (parts.length > 0) {
+        buffer.push(' ');
+        buffer.push.apply(buffer, parts);
+      }
+      // start tag must never be omitted if it has any attributes
+      else if (optional && optionalStartTags(tag)) {
+        optionalStartTag = tag;
+      }
+
+      buffer.push(buffer.pop() + (hasUnarySlash ? '/' : '') + '>');
+
+      if (autoGenerated && !options.includeAutoGeneratedTags) {
+        removeStartTag();
+        optionalStartTag = '';
+      }
+    },
+    end: function(tag, attrs, autoGenerated) {
+      var lowerTag = tag.toLowerCase();
+      if (lowerTag === 'svg') {
+        options = optionsStack.pop();
+      }
+      tag = options.caseSensitive ? tag : lowerTag;
+
+      // check if current tag is in a whitespace stack
+      if (options.collapseWhitespace) {
+        if (stackNoTrimWhitespace.length) {
+          if (tag === stackNoTrimWhitespace[stackNoTrimWhitespace.length - 1]) {
+            stackNoTrimWhitespace.pop();
+          }
+        }
+        else {
+          squashTrailingWhitespace('/' + tag);
+        }
+        if (stackNoCollapseWhitespace.length &&
+          tag === stackNoCollapseWhitespace[stackNoCollapseWhitespace.length - 1]) {
+          stackNoCollapseWhitespace.pop();
+        }
+      }
+
+      var isElementEmpty = false;
+      if (tag === currentTag) {
+        currentTag = '';
+        isElementEmpty = !hasChars;
+      }
+
+      if (options.removeOptionalTags) {
+        // <html>, <head> or <body> may be omitted if the element is empty
+        if (isElementEmpty && topLevelTags(optionalStartTag)) {
+          removeStartTag();
+        }
+        optionalStartTag = '';
+        // </html> or </body> may be omitted if not followed by comment
+        // </head> may be omitted if not followed by space or comment
+        // </p> may be omitted if no more content in non-</a> parent
+        // except for </dt> or </thead>, end tags may be omitted if no more content in parent element
+        if (htmlTags(tag) && optionalEndTag && !trailingTags(optionalEndTag) && (optionalEndTag !== 'p' || !pInlineTags(tag))) {
+          removeEndTag();
+        }
+        optionalEndTag = optionalEndTags(tag) ? tag : '';
+      }
+
+      if (options.removeEmptyElements && isElementEmpty && canRemoveElement(tag, attrs)) {
+        // remove last "element" from buffer
+        removeStartTag();
+        optionalStartTag = '';
+        optionalEndTag = '';
+      }
+      else {
+        if (autoGenerated && !options.includeAutoGeneratedTags) {
+          optionalEndTag = '';
+        }
+        else {
+          buffer.push('</' + tag + '>');
+        }
+        charsPrevTag = '/' + tag;
+        if (!inlineTags(tag)) {
+          currentChars = '';
+        }
+        else if (isElementEmpty) {
+          currentChars += '|';
+        }
+      }
+    },
+    chars: function(text, prevTag, nextTag) {
+      prevTag = prevTag === '' ? 'comment' : prevTag;
+      nextTag = nextTag === '' ? 'comment' : nextTag;
+      if (options.decodeEntities && text && !specialContentTags(currentTag)) {
+        text = decode(text);
+      }
+      if (options.collapseWhitespace) {
+        if (!stackNoTrimWhitespace.length) {
+          if (prevTag === 'comment') {
+            var prevComment = buffer[buffer.length - 1];
+            if (prevComment.indexOf(uidIgnore) === -1) {
+              if (!prevComment) {
+                prevTag = charsPrevTag;
+              }
+              if (buffer.length > 1 && (!prevComment || !options.conservativeCollapse && / $/.test(currentChars))) {
+                var charsIndex = buffer.length - 2;
+                buffer[charsIndex] = buffer[charsIndex].replace(/\s+$/, function(trailingSpaces) {
+                  text = trailingSpaces + text;
+                  return '';
+                });
+              }
+            }
+          }
+          if (prevTag) {
+            if (prevTag === '/nobr' || prevTag === 'wbr') {
+              if (/^\s/.test(text)) {
+                var tagIndex = buffer.length - 1;
+                while (tagIndex > 0 && buffer[tagIndex].lastIndexOf('<' + prevTag) !== 0) {
+                  tagIndex--;
+                }
+                trimTrailingWhitespace(tagIndex - 1, 'br');
+              }
+            }
+            else if (inlineTextTags(prevTag.charAt(0) === '/' ? prevTag.slice(1) : prevTag)) {
+              text = collapseWhitespace(text, options, /(?:^|\s)$/.test(currentChars));
+            }
+          }
+          if (prevTag || nextTag) {
+            text = collapseWhitespaceSmart(text, prevTag, nextTag, options);
+          }
+          else {
+            text = collapseWhitespace(text, options, true, true);
+          }
+          if (!text && /\s$/.test(currentChars) && prevTag && prevTag.charAt(0) === '/') {
+            trimTrailingWhitespace(buffer.length - 1, nextTag);
+          }
+        }
+        if (!stackNoCollapseWhitespace.length && nextTag !== 'html' && !(prevTag && nextTag)) {
+          text = collapseWhitespace(text, options, false, false, true);
+        }
+      }
+      if (options.processScripts && specialContentTags(currentTag)) {
+        text = processScript(text, options, currentAttrs);
+      }
+      if (isExecutableScript(currentTag, currentAttrs)) {
+        text = options.minifyJS(text);
+      }
+      if (isStyleSheet(currentTag, currentAttrs)) {
+        text = options.minifyCSS(text);
+      }
+      if (options.removeOptionalTags && text) {
+        // <html> may be omitted if first thing inside is not comment
+        // <body> may be omitted if first thing inside is not space, comment, <meta>, <link>, <script>, <style> or <template>
+        if (optionalStartTag === 'html' || optionalStartTag === 'body' && !/^\s/.test(text)) {
+          removeStartTag();
+        }
+        optionalStartTag = '';
+        // </html> or </body> may be omitted if not followed by comment
+        // </head>, </colgroup> or </caption> may be omitted if not followed by space or comment
+        if (compactTags(optionalEndTag) || looseTags(optionalEndTag) && !/^\s/.test(text)) {
+          removeEndTag();
+        }
+        optionalEndTag = '';
+      }
+      charsPrevTag = /^\s*$/.test(text) ? prevTag : 'comment';
+      if (options.decodeEntities && text && !specialContentTags(currentTag)) {
+        // semi-colon can be omitted
+        // https://mathiasbynens.be/notes/ambiguous-ampersands
+        text = text.replace(/&(#?[0-9a-zA-Z]+;)/g, '&amp$1').replace(/</g, '&lt;');
+      }
+      currentChars += text;
+      if (text) {
+        hasChars = true;
+      }
+      buffer.push(text);
+    },
+    comment: function(text, nonStandard) {
+      var prefix = nonStandard ? '<!' : '<!--';
+      var suffix = nonStandard ? '>' : '-->';
+      if (isConditionalComment(text)) {
+        text = prefix + cleanConditionalComment(text, options) + suffix;
+      }
+      else if (options.removeComments) {
+        if (isIgnoredComment(text, options)) {
+          text = '<!--' + text + '-->';
+        }
+        else {
+          text = '';
+        }
+      }
+      else {
+        text = prefix + text + suffix;
+      }
+      if (options.removeOptionalTags && text) {
+        // preceding comments suppress tag omissions
+        optionalStartTag = '';
+        optionalEndTag = '';
+      }
+      buffer.push(text);
+    },
+    doctype: function(doctype) {
+      buffer.push(options.useShortDoctype ? '<!DOCTYPE html>' : collapseWhitespaceAll(doctype));
+    },
+    customAttrAssign: options.customAttrAssign,
+    customAttrSurround: options.customAttrSurround
+  });
+
+  if (options.removeOptionalTags) {
+    // <html> may be omitted if first thing inside is not comment
+    // <head> or <body> may be omitted if empty
+    if (topLevelTags(optionalStartTag)) {
+      removeStartTag();
+    }
+    // except for </dt> or </thead>, end tags may be omitted if no more content in parent element
+    if (optionalEndTag && !trailingTags(optionalEndTag)) {
+      removeEndTag();
+    }
+  }
+  if (options.collapseWhitespace) {
+    squashTrailingWhitespace('br');
+  }
+
+  var str = joinResultSegments(buffer, options);
+
+  if (uidPattern) {
+    str = str.replace(uidPattern, function(match, prefix, index, suffix) {
+      var chunk = ignoredCustomMarkupChunks[+index][0];
+      if (options.collapseWhitespace) {
+        if (prefix !== '\t') {
+          chunk = prefix + chunk;
+        }
+        if (suffix !== '\t') {
+          chunk += suffix;
+        }
+        return collapseWhitespace(chunk, {
+          preserveLineBreaks: options.preserveLineBreaks,
+          conservativeCollapse: !options.trimCustomFragments
+        }, /^\s/.test(chunk), /\s$/.test(chunk));
+      }
+      return chunk;
+    });
+  }
+  if (uidIgnore) {
+    str = str.replace(new RegExp('<!--' + uidIgnore + '([0-9]+)-->', 'g'), function(match, index) {
+      return ignoredMarkupChunks[+index];
+    });
+  }
+
+  options.log('minified in: ' + (Date.now() - t) + 'ms');
+  return str;
+}
+
+function joinResultSegments(results, options) {
+  var str;
+  var maxLineLength = options.maxLineLength;
+  if (maxLineLength) {
+    var token;
+    var lines = [];
+    var line = '';
+    for (var i = 0, len = results.length; i < len; i++) {
+      token = results[i];
+      if (line.length + token.length < maxLineLength) {
+        line += token;
+      }
+      else {
+        lines.push(line.replace(/^\n/, ''));
+        line = token;
+      }
+    }
+    lines.push(line);
+
+    str = lines.join('\n');
+  }
+  else {
+    str = results.join('');
+  }
+  return options.collapseWhitespace ? collapseWhitespace(str, options, true, true) : str;
+}
+
+exports.minify = function(value, options) {
+  return minify(value, options);
+};
diff --git a/node_modules/html-minifier/src/htmlparser.js b/node_modules/html-minifier/src/htmlparser.js
new file mode 100644
index 000000000..2195347dc
--- /dev/null
+++ b/node_modules/html-minifier/src/htmlparser.js
@@ -0,0 +1,528 @@
+/*!
+ * HTML Parser By John Resig (ejohn.org)
+ * Modified by Juriy "kangax" Zaytsev
+ * Original code by Erik Arvidsson, Mozilla Public License
+ * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+ */
+
+/*
+ * // Use like so:
+ * HTMLParser(htmlString, {
+ *     start: function(tag, attrs, unary) {},
+ *     end: function(tag) {},
+ *     chars: function(text) {},
+ *     comment: function(text) {}
+ * });
+ *
+ * // or to get an XML string:
+ * HTMLtoXML(htmlString);
+ *
+ * // or to get an XML DOM Document
+ * HTMLtoDOM(htmlString);
+ *
+ * // or to inject into an existing document/DOM node
+ * HTMLtoDOM(htmlString, document);
+ * HTMLtoDOM(htmlString, document.body);
+ *
+ */
+
+ /* global ActiveXObject, DOMDocument */
+
+'use strict';
+
+var createMapFromString = require('./utils').createMapFromString;
+
+function makeMap(values) {
+  return createMapFromString(values, true);
+}
+
+// Regular Expressions for parsing tags and attributes
+var singleAttrIdentifier = /([^\s"'<>/=]+)/,
+    singleAttrAssigns = [/=/],
+    singleAttrValues = [
+      // attr value double quotes
+      /"([^"]*)"+/.source,
+      // attr value, single quotes
+      /'([^']*)'+/.source,
+      // attr value, no quotes
+      /([^ \t\n\f\r"'`=<>]+)/.source
+    ],
+    // https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
+    qnameCapture = (function() {
+      var ncname = require('ncname').source.slice(1, -1);
+      return '((?:' + ncname + '\\:)?' + ncname + ')';
+    })(),
+    startTagOpen = new RegExp('^<' + qnameCapture),
+    startTagClose = /^\s*(\/?)>/,
+    endTag = new RegExp('^<\\/' + qnameCapture + '[^>]*>'),
+    doctype = /^<!DOCTYPE [^>]+>/i;
+
+var IS_REGEX_CAPTURING_BROKEN = false;
+'x'.replace(/x(.)?/g, function(m, g) {
+  IS_REGEX_CAPTURING_BROKEN = g === '';
+});
+
+// Empty Elements
+var empty = makeMap('area,base,basefont,br,col,embed,frame,hr,img,input,isindex,keygen,link,meta,param,source,track,wbr');
+
+// Inline Elements
+var inline = makeMap('a,abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,code,del,dfn,em,font,i,iframe,img,input,ins,kbd,label,map,noscript,object,q,s,samp,script,select,small,span,strike,strong,sub,sup,svg,textarea,tt,u,var');
+
+// Elements that you can, intentionally, leave open
+// (and which close themselves)
+var closeSelf = makeMap('colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source');
+
+// Attributes that have their values filled in disabled='disabled'
+var fillAttrs = makeMap('checked,compact,declare,defer,disabled,ismap,multiple,nohref,noresize,noshade,nowrap,readonly,selected');
+
+// Special Elements (can contain anything)
+var special = makeMap('script,style');
+
+// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+var nonPhrasing = makeMap('address,article,aside,base,blockquote,body,caption,col,colgroup,dd,details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,title,tr,track');
+
+var reCache = {};
+
+function attrForHandler(handler) {
+  var pattern = singleAttrIdentifier.source +
+                '(?:\\s*(' + joinSingleAttrAssigns(handler) + ')' +
+                '[ \\t\\n\\f\\r]*(?:' + singleAttrValues.join('|') + '))?';
+  if (handler.customAttrSurround) {
+    var attrClauses = [];
+    for (var i = handler.customAttrSurround.length - 1; i >= 0; i--) {
+      attrClauses[i] = '(?:' +
+                       '(' + handler.customAttrSurround[i][0].source + ')\\s*' +
+                       pattern +
+                       '\\s*(' + handler.customAttrSurround[i][1].source + ')' +
+                       ')';
+    }
+    attrClauses.push('(?:' + pattern + ')');
+    pattern = '(?:' + attrClauses.join('|') + ')';
+  }
+  return new RegExp('^\\s*' + pattern);
+}
+
+function joinSingleAttrAssigns(handler) {
+  return singleAttrAssigns.concat(
+    handler.customAttrAssign || []
+  ).map(function(assign) {
+    return '(?:' + assign.source + ')';
+  }).join('|');
+}
+
+function HTMLParser(html, handler) {
+  var stack = [], lastTag;
+  var attribute = attrForHandler(handler);
+  var last, prevTag, nextTag;
+  while (html) {
+    last = html;
+    // Make sure we're not in a script or style element
+    if (!lastTag || !special(lastTag)) {
+      var textEnd = html.indexOf('<');
+      if (textEnd === 0) {
+        // Comment:
+        if (/^<!--/.test(html)) {
+          var commentEnd = html.indexOf('-->');
+
+          if (commentEnd >= 0) {
+            if (handler.comment) {
+              handler.comment(html.substring(4, commentEnd));
+            }
+            html = html.substring(commentEnd + 3);
+            prevTag = '';
+            continue;
+          }
+        }
+
+        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+        if (/^<!\[/.test(html)) {
+          var conditionalEnd = html.indexOf(']>');
+
+          if (conditionalEnd >= 0) {
+            if (handler.comment) {
+              handler.comment(html.substring(2, conditionalEnd + 1), true /* non-standard */);
+            }
+            html = html.substring(conditionalEnd + 2);
+            prevTag = '';
+            continue;
+          }
+        }
+
+        // Doctype:
+        var doctypeMatch = html.match(doctype);
+        if (doctypeMatch) {
+          if (handler.doctype) {
+            handler.doctype(doctypeMatch[0]);
+          }
+          html = html.substring(doctypeMatch[0].length);
+          prevTag = '';
+          continue;
+        }
+
+        // End tag:
+        var endTagMatch = html.match(endTag);
+        if (endTagMatch) {
+          html = html.substring(endTagMatch[0].length);
+          endTagMatch[0].replace(endTag, parseEndTag);
+          prevTag = '/' + endTagMatch[1].toLowerCase();
+          continue;
+        }
+
+        // Start tag:
+        var startTagMatch = parseStartTag(html);
+        if (startTagMatch) {
+          html = startTagMatch.rest;
+          handleStartTag(startTagMatch);
+          prevTag = startTagMatch.tagName.toLowerCase();
+          continue;
+        }
+      }
+
+      var text;
+      if (textEnd >= 0) {
+        text = html.substring(0, textEnd);
+        html = html.substring(textEnd);
+      }
+      else {
+        text = html;
+        html = '';
+      }
+
+      // next tag
+      var nextTagMatch = parseStartTag(html);
+      if (nextTagMatch) {
+        nextTag = nextTagMatch.tagName;
+      }
+      else {
+        nextTagMatch = html.match(endTag);
+        if (nextTagMatch) {
+          nextTag = '/' + nextTagMatch[1];
+        }
+        else {
+          nextTag = '';
+        }
+      }
+
+      if (handler.chars) {
+        handler.chars(text, prevTag, nextTag);
+      }
+      prevTag = '';
+
+    }
+    else {
+      var stackedTag = lastTag.toLowerCase();
+      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)</' + stackedTag + '[^>]*>', 'i'));
+
+      html = html.replace(reStackedTag, function(all, text) {
+        if (stackedTag !== 'script' && stackedTag !== 'style' && stackedTag !== 'noscript') {
+          text = text
+            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+        }
+
+        if (handler.chars) {
+          handler.chars(text);
+        }
+
+        return '';
+      });
+
+      parseEndTag('</' + stackedTag + '>', stackedTag);
+    }
+
+    if (html === last) {
+      throw new Error('Parse Error: ' + html);
+    }
+  }
+
+  if (!handler.partialMarkup) {
+    // Clean up any remaining tags
+    parseEndTag();
+  }
+
+  function parseStartTag(input) {
+    var start = input.match(startTagOpen);
+    if (start) {
+      var match = {
+        tagName: start[1],
+        attrs: []
+      };
+      input = input.slice(start[0].length);
+      var end, attr;
+      while (!(end = input.match(startTagClose)) && (attr = input.match(attribute))) {
+        input = input.slice(attr[0].length);
+        match.attrs.push(attr);
+      }
+      if (end) {
+        match.unarySlash = end[1];
+        match.rest = input.slice(end[0].length);
+        return match;
+      }
+    }
+  }
+
+  function handleStartTag(match) {
+    var tagName = match.tagName;
+    var unarySlash = match.unarySlash;
+
+    if (handler.html5 && lastTag === 'p' && nonPhrasing(tagName)) {
+      parseEndTag('', lastTag);
+    }
+
+    if (!handler.html5) {
+      while (lastTag && inline(lastTag)) {
+        parseEndTag('', lastTag);
+      }
+    }
+
+    if (closeSelf(tagName) && lastTag === tagName) {
+      parseEndTag('', tagName);
+    }
+
+    var unary = empty(tagName) || tagName === 'html' && lastTag === 'head' || !!unarySlash;
+
+    var attrs = match.attrs.map(function(args) {
+      var name, value, customOpen, customClose, customAssign, quote;
+      var ncp = 7; // number of captured parts, scalar
+
+      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
+      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
+        if (args[3] === '') { delete args[3]; }
+        if (args[4] === '') { delete args[4]; }
+        if (args[5] === '') { delete args[5]; }
+      }
+
+      function populate(index) {
+        customAssign = args[index];
+        value = args[index + 1];
+        if (typeof value !== 'undefined') {
+          return '"';
+        }
+        value = args[index + 2];
+        if (typeof value !== 'undefined') {
+          return '\'';
+        }
+        value = args[index + 3];
+        if (typeof value === 'undefined' && fillAttrs(name)) {
+          value = name;
+        }
+        return '';
+      }
+
+      var j = 1;
+      if (handler.customAttrSurround) {
+        for (var i = 0, l = handler.customAttrSurround.length; i < l; i++, j += ncp) {
+          name = args[j + 1];
+          if (name) {
+            quote = populate(j + 2);
+            customOpen = args[j];
+            customClose = args[j + 6];
+            break;
+          }
+        }
+      }
+
+      if (!name && (name = args[j])) {
+        quote = populate(j + 1);
+      }
+
+      return {
+        name: name,
+        value: value,
+        customAssign: customAssign || '=',
+        customOpen: customOpen || '',
+        customClose: customClose || '',
+        quote: quote || ''
+      };
+    });
+
+    if (!unary) {
+      stack.push({ tag: tagName, attrs: attrs });
+      lastTag = tagName;
+      unarySlash = '';
+    }
+
+    if (handler.start) {
+      handler.start(tagName, attrs, unary, unarySlash);
+    }
+  }
+
+  function parseEndTag(tag, tagName) {
+    var pos;
+
+    // Find the closest opened tag of the same type
+    if (tagName) {
+      var needle = tagName.toLowerCase();
+      for (pos = stack.length - 1; pos >= 0; pos--) {
+        if (stack[pos].tag.toLowerCase() === needle) {
+          break;
+        }
+      }
+    }
+    // If no tag name is provided, clean shop
+    else {
+      pos = 0;
+    }
+
+    if (pos >= 0) {
+      // Close all the open elements, up the stack
+      for (var i = stack.length - 1; i >= pos; i--) {
+        if (handler.end) {
+          handler.end(stack[i].tag, stack[i].attrs, i > pos || !tag);
+        }
+      }
+
+      // Remove the open elements from the stack
+      stack.length = pos;
+      lastTag = pos && stack[pos - 1].tag;
+    }
+    else if (tagName.toLowerCase() === 'br') {
+      if (handler.start) {
+        handler.start(tagName, [], true, '');
+      }
+    }
+    else if (tagName.toLowerCase() === 'p') {
+      if (handler.start) {
+        handler.start(tagName, [], false, '', true);
+      }
+      if (handler.end) {
+        handler.end(tagName, []);
+      }
+    }
+  }
+}
+
+exports.HTMLParser = HTMLParser;
+exports.HTMLtoXML = function(html) {
+  var results = '';
+
+  new HTMLParser(html, {
+    start: function(tag, attrs, unary) {
+      results += '<' + tag;
+
+      for (var i = 0, len = attrs.length; i < len; i++) {
+        results += ' ' + attrs[i].name + '="' + (attrs[i].value || '').replace(/"/g, '&#34;') + '"';
+      }
+
+      results += (unary ? '/' : '') + '>';
+    },
+    end: function(tag) {
+      results += '</' + tag + '>';
+    },
+    chars: function(text) {
+      results += text;
+    },
+    comment: function(text) {
+      results += '<!--' + text + '-->';
+    },
+    ignore: function(text) {
+      results += text;
+    }
+  });
+
+  return results;
+};
+
+exports.HTMLtoDOM = function(html, doc) {
+  // There can be only one of these elements
+  var one = {
+    html: true,
+    head: true,
+    body: true,
+    title: true
+  };
+
+  // Enforce a structure for the document
+  var structure = {
+    link: 'head',
+    base: 'head'
+  };
+
+  if (doc) {
+    doc = doc.ownerDocument || doc.getOwnerDocument && doc.getOwnerDocument() || doc;
+  }
+  else if (typeof DOMDocument !== 'undefined') {
+    doc = new DOMDocument();
+  }
+  else if (typeof document !== 'undefined' && document.implementation && document.implementation.createDocument) {
+    doc = document.implementation.createDocument('', '', null);
+  }
+  else if (typeof ActiveX !== 'undefined') {
+    doc = new ActiveXObject('Msxml.DOMDocument');
+  }
+
+  var elems = [],
+      documentElement = doc.documentElement ||
+        doc.getDocumentElement && doc.getDocumentElement();
+
+  // If we're dealing with an empty document then we
+  // need to pre-populate it with the HTML document structure
+  if (!documentElement && doc.createElement) {
+    (function() {
+      var html = doc.createElement('html');
+      var head = doc.createElement('head');
+      head.appendChild(doc.createElement('title'));
+      html.appendChild(head);
+      html.appendChild(doc.createElement('body'));
+      doc.appendChild(html);
+    })();
+  }
+
+  // Find all the unique elements
+  if (doc.getElementsByTagName) {
+    for (var i in one) {
+      one[i] = doc.getElementsByTagName(i)[0];
+    }
+  }
+
+  // If we're working with a document, inject contents into
+  // the body element
+  var curParentNode = one.body;
+
+  new HTMLParser(html, {
+    start: function(tagName, attrs, unary) {
+      // If it's a pre-built element, then we can ignore
+      // its construction
+      if (one[tagName]) {
+        curParentNode = one[tagName];
+        return;
+      }
+
+      var elem = doc.createElement(tagName);
+
+      for (var attr in attrs) {
+        elem.setAttribute(attrs[attr].name, attrs[attr].value);
+      }
+
+      if (structure[tagName] && typeof one[structure[tagName]] !== 'boolean') {
+        one[structure[tagName]].appendChild(elem);
+      }
+      else if (curParentNode && curParentNode.appendChild) {
+        curParentNode.appendChild(elem);
+      }
+
+      if (!unary) {
+        elems.push(elem);
+        curParentNode = elem;
+      }
+    },
+    end: function(/* tag */) {
+      elems.length -= 1;
+
+      // Init the new parentNode
+      curParentNode = elems[elems.length - 1];
+    },
+    chars: function(text) {
+      curParentNode.appendChild(doc.createTextNode(text));
+    },
+    comment: function(/* text */) {
+      // create comment node
+    },
+    ignore: function(/* text */) {
+      // What to do here?
+    }
+  });
+
+  return doc;
+};
diff --git a/node_modules/html-minifier/src/tokenchain.js b/node_modules/html-minifier/src/tokenchain.js
new file mode 100644
index 000000000..f8892d017
--- /dev/null
+++ b/node_modules/html-minifier/src/tokenchain.js
@@ -0,0 +1,71 @@
+'use strict';
+
+function Sorter() {
+}
+
+Sorter.prototype.sort = function(tokens, fromIndex) {
+  fromIndex = fromIndex || 0;
+  for (var i = 0, len = this.keys.length; i < len; i++) {
+    var key = this.keys[i];
+    var token = key.slice(1);
+    var index = tokens.indexOf(token, fromIndex);
+    if (index !== -1) {
+      do {
+        if (index !== fromIndex) {
+          tokens.splice(index, 1);
+          tokens.splice(fromIndex, 0, token);
+        }
+        fromIndex++;
+      } while ((index = tokens.indexOf(token, fromIndex)) !== -1);
+      return this[key].sort(tokens, fromIndex);
+    }
+  }
+  return tokens;
+};
+
+function TokenChain() {
+}
+
+TokenChain.prototype = {
+  add: function(tokens) {
+    var self = this;
+    tokens.forEach(function(token) {
+      var key = '$' + token;
+      if (!self[key]) {
+        self[key] = [];
+        self[key].processed = 0;
+      }
+      self[key].push(tokens);
+    });
+  },
+  createSorter: function() {
+    var self = this;
+    var sorter = new Sorter();
+    sorter.keys = Object.keys(self).sort(function(j, k) {
+      var m = self[j].length;
+      var n = self[k].length;
+      return m < n ? 1 : m > n ? -1 : j < k ? -1 : j > k ? 1 : 0;
+    }).filter(function(key) {
+      if (self[key].processed < self[key].length) {
+        var token = key.slice(1);
+        var chain = new TokenChain();
+        self[key].forEach(function(tokens) {
+          var index;
+          while ((index = tokens.indexOf(token)) !== -1) {
+            tokens.splice(index, 1);
+          }
+          tokens.forEach(function(token) {
+            self['$' + token].processed++;
+          });
+          chain.add(tokens.slice(0));
+        });
+        sorter[key] = chain.createSorter();
+        return true;
+      }
+      return false;
+    });
+    return sorter;
+  }
+};
+
+module.exports = TokenChain;
diff --git a/node_modules/html-minifier/src/utils.js b/node_modules/html-minifier/src/utils.js
new file mode 100644
index 000000000..62b43636d
--- /dev/null
+++ b/node_modules/html-minifier/src/utils.js
@@ -0,0 +1,18 @@
+'use strict';
+
+function createMap(values, ignoreCase) {
+  var map = {};
+  values.forEach(function(value) {
+    map[value] = 1;
+  });
+  return ignoreCase ? function(value) {
+    return map[value.toLowerCase()] === 1;
+  } : function(value) {
+    return map[value] === 1;
+  };
+}
+
+exports.createMap = createMap;
+exports.createMapFromString = function(values, ignoreCase) {
+  return createMap(values.split(/,/), ignoreCase);
+};