adding concept index and license information

5 files changed, 1888 insertions, 45 deletions

diff --git a/COPYING b/COPYING
index 778df0f8..4befc1d6 100644
--- a/COPYING
+++ b/COPYING
@@ -7,16 +7,8 @@ GPL has little impact as the backend is not supposed to be
 directly accessible to the Internet).  The license for this
 code is in COPYING.GPL and COPYING.AGPL.
 
-The merchant's frontend logic (i.e. JavaScript interacting with
-the wallet, sample code for a shop) is under the GNU LGPL (but
-we may choose to change this to be in the public domain or
-BSD-licensed if necessary; the code is so short that there is
-anyway the question whether it is copyrightable).  Under this same
-license, it comes the merchant library (src/lib/) as it can be linked
-with more diverse licensed software.  The license text for this code
-is in COPYING.LGPL.
-
-
-In examples/blog/articles/ we included a book by Richard Stallman.
-It comes with its own permissive license (see COPYING in the
-directory).
+The merchant's library logic (src/lib/) is under the GNU LGPL (but we
+may choose to change this to be in the public domain or BSD-licensed
+if necessary).  Under this same license, it comes the merchant library
+(src/lib/) as it can be linked with more diverse licensed software.
+The license text for this code is in COPYING.LGPL.
\ No newline at end of file
diff --git a/doc/agpl.texi b/doc/agpl.texi
new file mode 100644
index 00000000..e6ee662e
--- /dev/null
+++ b/doc/agpl.texi
@@ -0,0 +1,698 @@
+@c The GNU Affero General Public License.
+@center Version 3, 19 November 2007
+
+@c This file is intended to be included within another document,
+@c hence no sectioning command or @node.
+
+@display
+Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/}
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+@end display
+
+@heading Preamble
+
+The GNU Affero General Public License is a free, copyleft license
+for software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are
+designed to take away your freedom to share and change the works.  By
+contrast, our General Public Licenses are intended to guarantee your
+freedom to share and change all versions of a program--to make sure it
+remains free software for all its users.
+
+When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
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+
+An older license, called the Affero General Public License and
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+@item
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+@item
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+
+@item
+Convey the object code using peer-to-peer transmission, provided you
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+@end enumerate
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+@item
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+
+Nothing in this License shall be construed as excluding or limiting
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+
+@item No Surrender of Others' Freedom.
+
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+
+@item Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users interacting
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+Notwithstanding any other provision of this License, you have permission to
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+@item Revised Versions of this License.
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+The Free Software Foundation may publish revised and/or new versions
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+following the terms and conditions either of that numbered version or
+of any later version published by the Free Software Foundation.  If
+the Program does not specify a version number of the GNU Affero General
+Public License, you may choose any version ever published by the Free
+Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions
+of the GNU Affero General Public License can be used, that proxy's public
+statement of acceptance of a version permanently authorizes you to
+choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+@item Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT
+WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND
+PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.
+
+@item Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+@item Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+@end enumerate
+
+@heading END OF TERMS AND CONDITIONS
+
+@heading How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the ``copyright'' line and a pointer to where the full notice is found.
+
+@smallexample
+@var{one line to give the program's name and a brief idea of what it does.}
+Copyright (C) @var{year} @var{name of author}
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see @url{http://www.gnu.org/licenses/}.
+@end smallexample
+
+Also add information on how to contact you by electronic and paper mail.
+
+If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a ``Source'' link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+You should also get your employer (if you work as a programmer) or school,
+if any, to sign a ``copyright disclaimer'' for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+@url{http://www.gnu.org/licenses/}.
diff --git a/doc/fdl-1.3.texi b/doc/fdl-1.3.texi
new file mode 100644
index 00000000..8805f1a4
--- /dev/null
+++ b/doc/fdl-1.3.texi
@@ -0,0 +1,506 @@
+@c The GNU Free Documentation License.
+@center Version 1.3, 3 November 2008
+
+@c This file is intended to be included within another document,
+@c hence no sectioning command or @node.
+
+@display
+Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+@uref{http://fsf.org/}
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+@end display
+
+@enumerate 0
+@item
+PREAMBLE
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document @dfn{free} in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of ``copyleft'', which means that derivative
+works of the document must themselves be free in the same sense.  It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does.  But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book.  We recommend this License
+principally for works whose purpose is instruction or reference.
+
+@item
+APPLICABILITY AND DEFINITIONS
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License.  Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein.  The ``Document'', below,
+refers to any such manual or work.  Any member of the public is a
+licensee, and is addressed as ``you''.  You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A ``Modified Version'' of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A ``Secondary Section'' is a named appendix or a front-matter section
+of the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall
+subject (or to related matters) and contains nothing that could fall
+directly within that overall subject.  (Thus, if the Document is in
+part a textbook of mathematics, a Secondary Section may not explain
+any mathematics.)  The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The ``Invariant Sections'' are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License.  If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant.  The Document may contain zero
+Invariant Sections.  If the Document does not identify any Invariant
+Sections then there are none.
+
+The ``Cover Texts'' are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License.  A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A ``Transparent'' copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters.  A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text.  A copy that is not ``Transparent'' is called ``Opaque''.
+
+Examples of suitable formats for Transparent copies include plain
+@sc{ascii} without markup, Texinfo input format, La@TeX{} input
+format, @acronym{SGML} or @acronym{XML} using a publicly available
+@acronym{DTD}, and standard-conforming simple @acronym{HTML},
+PostScript or @acronym{PDF} designed for human modification.  Examples
+of transparent image formats include @acronym{PNG}, @acronym{XCF} and
+@acronym{JPG}.  Opaque formats include proprietary formats that can be
+read and edited only by proprietary word processors, @acronym{SGML} or
+@acronym{XML} for which the @acronym{DTD} and/or processing tools are
+not generally available, and the machine-generated @acronym{HTML},
+PostScript or @acronym{PDF} produced by some word processors for
+output purposes only.
+
+The ``Title Page'' means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page.  For works in
+formats which do not have any title page as such, ``Title Page'' means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The ``publisher'' means any person or entity that distributes copies
+of the Document to the public.
+
+A section ``Entitled XYZ'' means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language.  (Here XYZ stands for a
+specific section name mentioned below, such as ``Acknowledgements'',
+``Dedications'', ``Endorsements'', or ``History''.)  To ``Preserve the Title''
+of such a section when you modify the Document means that it remains a
+section ``Entitled XYZ'' according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document.  These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+@item
+VERBATIM COPYING
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License.  You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute.  However, you may accept
+compensation in exchange for copies.  If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+@item
+COPYING IN QUANTITY
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover.  Both covers must also clearly and legibly identify
+you as the publisher of these copies.  The front cover must present
+the full title with all words of the title equally prominent and
+visible.  You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+@item
+MODIFICATIONS
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it.  In addition, you must do these things in the Modified Version:
+
+@enumerate A
+@item
+Use in the Title Page (and on the covers, if any) a title distinct
+from that of the Document, and from those of previous versions
+(which should, if there were any, be listed in the History section
+of the Document).  You may use the same title as a previous version
+if the original publisher of that version gives permission.
+
+@item
+List on the Title Page, as authors, one or more persons or entities
+responsible for authorship of the modifications in the Modified
+Version, together with at least five of the principal authors of the
+Document (all of its principal authors, if it has fewer than five),
+unless they release you from this requirement.
+
+@item
+State on the Title page the name of the publisher of the
+Modified Version, as the publisher.
+
+@item
+Preserve all the copyright notices of the Document.
+
+@item
+Add an appropriate copyright notice for your modifications
+adjacent to the other copyright notices.
+
+@item
+Include, immediately after the copyright notices, a license notice
+giving the public permission to use the Modified Version under the
+terms of this License, in the form shown in the Addendum below.
+
+@item
+Preserve in that license notice the full lists of Invariant Sections
+and required Cover Texts given in the Document's license notice.
+
+@item
+Include an unaltered copy of this License.
+
+@item
+Preserve the section Entitled ``History'', Preserve its Title, and add
+to it an item stating at least the title, year, new authors, and
+publisher of the Modified Version as given on the Title Page.  If
+there is no section Entitled ``History'' in the Document, create one
+stating the title, year, authors, and publisher of the Document as
+given on its Title Page, then add an item describing the Modified
+Version as stated in the previous sentence.
+
+@item
+Preserve the network location, if any, given in the Document for
+public access to a Transparent copy of the Document, and likewise
+the network locations given in the Document for previous versions
+it was based on.  These may be placed in the ``History'' section.
+You may omit a network location for a work that was published at
+least four years before the Document itself, or if the original
+publisher of the version it refers to gives permission.
+
+@item
+For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve
+the Title of the section, and preserve in the section all the
+substance and tone of each of the contributor acknowledgements and/or
+dedications given therein.
+
+@item
+Preserve all the Invariant Sections of the Document,
+unaltered in their text and in their titles.  Section numbers
+or the equivalent are not considered part of the section titles.
+
+@item
+Delete any section Entitled ``Endorsements''.  Such a section
+may not be included in the Modified Version.
+
+@item
+Do not retitle any existing section to be Entitled ``Endorsements'' or
+to conflict in title with any Invariant Section.
+
+@item
+Preserve any Warranty Disclaimers.
+@end enumerate
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant.  To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled ``Endorsements'', provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version.  Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity.  If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+@item
+COMBINING DOCUMENTS
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy.  If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled ``History''
+in the various original documents, forming one section Entitled
+``History''; likewise combine any sections Entitled ``Acknowledgements'',
+and any sections Entitled ``Dedications''.  You must delete all
+sections Entitled ``Endorsements.''
+
+@item
+COLLECTIONS OF DOCUMENTS
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+@item
+AGGREGATION WITH INDEPENDENT WORKS
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an ``aggregate'' if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+@item
+TRANSLATION
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections.  You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers.  In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled ``Acknowledgements'',
+``Dedications'', or ``History'', the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+@item
+TERMINATION
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+@item
+FUTURE REVISIONS OF THIS LICENSE
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.  See
+@uref{http://www.gnu.org/copyleft/}.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License ``or any later version'' applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation.  If the Document does not specify a version
+number of this License, you may choose any version ever published (not
+as a draft) by the Free Software Foundation.  If the Document
+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+@item
+RELICENSING
+
+``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works.  A
+public wiki that anybody can edit is an example of such a server.  A
+``Massive Multiauthor Collaboration'' (or ``MMC'') contained in the
+site means any set of copyrightable works thus published on the MMC
+site.
+
+``CC-BY-SA'' means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
+corporation with a principal place of business in San Francisco,
+California, as well as future copyleft versions of that license
+published by that same organization.
+
+``Incorporate'' means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is ``eligible for relicensing'' if it is licensed under this
+License, and if all works that were first published under this License
+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+@end enumerate
+
+@page
+@heading ADDENDUM: How to use this License for your documents
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+@smallexample
+@group
+  Copyright (C)  @var{year}  @var{your name}.
+  Permission is granted to copy, distribute and/or modify this document
+  under the terms of the GNU Free Documentation License, Version 1.3
+  or any later version published by the Free Software Foundation;
+  with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+  Texts.  A copy of the license is included in the section entitled ``GNU
+  Free Documentation License''.
+@end group
+@end smallexample
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the ``with@dots{}Texts.'' line with this:
+
+@smallexample
+@group
+    with the Invariant Sections being @var{list their titles}, with
+    the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
+    being @var{list}.
+@end group
+@end smallexample
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
+
+@c Local Variables:
+@c ispell-local-pdict: "ispell-dict"
+@c End:
+
diff --git a/doc/lgpl.texi b/doc/lgpl.texi
new file mode 100644
index 00000000..ab03d6cc
--- /dev/null
+++ b/doc/lgpl.texi
@@ -0,0 +1,549 @@
+@c The GNU Lesser General Public License.
+@center Version 2.1, February 1999
+
+@c This file is intended to be included within another document,
+@c hence no sectioning command or @node.
+
+@display
+Copyright @copyright{} 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+as the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+@end display
+
+@subheading Preamble
+
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+That's all there is to it!
diff --git a/doc/manual.texi b/doc/manual.texi
index a0de9df5..c0f6e4ed 100644
--- a/doc/manual.texi
+++ b/doc/manual.texi
@@ -56,6 +56,21 @@ Texts.  A copy of the license is included in the section entitled
 * Installation::            Installing the Merchant backend
 * Configuration::           How to set up the Merchant backend
 * Advanced topics::         Detailed solutions to specific issues
+
+
+Appendices
+
+* GNU-LGPL::                     The GNU Lesser General Public License says how you
+                                 can use the code of libtalermerchant.so in your own projects.
+* GNU Affero GPL::               The Affero GNU General Public License says how you
+                                 can copy and share the Taler merchant backend.
+* GNU-FDL::                      The GNU Free Documentation License says how you
+                                 can copy and share the documentation of GNU Taler.
+
+Indices
+
+* Concept Index::               Index of concepts and programs.
+
 @end menu
 
 
@@ -73,40 +88,68 @@ Hence, GNU Taler is compatible with anti-money-laundering (AML) and
 know-your-customer (KYC) regulation, as well as data protection
 regulation (such as GDPR).
 
+GNU Taler is not yet production-ready, after following this manual
+you will have a backend that can process payments in ``KUDOS'', but
+not regular currencies.  This is not so much because of limitations
+in the backend, but because we are not aware of a Taler exchange
+operator offering regular currencies today.
 
 @section About this manual
 
-This manual describes how to install a GNU Taler merchant @emph{backend},
-so it is for system administrators.
-
-@c split manual into two: one for sysadmins (Ch. 1-3,5), one for Web developers (1+4)
+This tutorial targets system administrators who want to
+install a GNU Taler merchant @emph{backend}.
 
 We expect some moderate familiarity with the compilation and installation
 of free software packages. An understanding of cryptography is not required.
 
-@c Add section giving an overview of what we will do in the tutorial!
+This first chapter of the tutorial will give a brief overview of the overall
+Taler architecture, describing the environment in which the Taler backend
+operates.  The second chapter then explains how to install the software,
+including key dependencies.  The third chapter will explain how to
+configure the backend, including in particular the configuration of the
+bank account details of the merchant.
+
+@c The fouth chapter will explain how to test that the setup worked correctly.
+
+The last chapter gives some additional information about advanced topics
+which will be useful for system administrators but are not necessary for
+operating a basic backend.
 
 @section Architecture overview
 
+@cindex crypto-currency
+@cindex KUDOS
+Taler is a pure payment system, not a new crypto-currency. As such, it
+operates in a traditional banking context.  In particular, this means
+that in order to receive funds via Taler, the merchant must have a
+regular bank account, and payments can be executed in ordinary
+currencies such as USD or EUR.  For testing purposes, Taler uses a
+special currency ``KUDOS'' and includes its own special bank.
+
 The Taler software stack for a merchant consists of four main components:
 
 @itemize
+@cindex frontend
 @item A frontend which interacts with the customer's browser. The
   frontend enables the customer to build a shopping cart and place
   an order.  Upon payment, it triggers the respective business logic
   to satisfy the order.  This component is not included with Taler,
   but rather assumed to exist at the merchant. This manual
   describes how to integrate Taler with Web shop frontends.
+@cindex back office
 @item A back office application that enables the shop operators to
   view customer orders, match them to financial transfers, and possibly
   approve refunds if an order cannot be satisfied.  This component is
   again not included with Taler, but rather assumed to exist at the
   merchant. This manual will describe how to integrate such a component
   to handle payments managed by Taler.
+@cindex backend
 @item A Taler-specific payment backend which makes it easy for the
   frontend to process financial transactions with Taler.  The
   next two chapters will describe how to install and configure
   this backend.
+@cindex DBMS
+@cindex Postgres
 @item A DBMS which stores the transaction history for the Taler backend.
   For now, the GNU Taler reference implemenation only supports Postgres,
   but the code could be easily extended to support another DBMS.
@@ -117,7 +160,7 @@ key components:
 
 @center @image{arch, 3in, 4in}
 
-
+@cindex RESTful
 Basically, the backend provides the cryptographic protocol support,
 stores Taler-specific financial information in a DBMS and communicates
 with the GNU Taler exchange over the Internet.  The frontend accesses
@@ -184,6 +227,7 @@ installing the libgnunetutil and GNU Taler exchange dependencies.
 
 @subsection Installing libgnunetutil
 
+@cindex GNUnet
 Before you install libgnunetutil, you must download and install the
 dependencies mentioned in the previous section, otherwise the build
 may succeed but fail to export some of the tooling required by Taler.
@@ -207,6 +251,7 @@ If you did not specify a prefix, GNUnet will install to
 
 @subsection Installing the GNU Taler exchange
 
+@cindex exchange
 After installing GNUnet, you can download and install
 the exchange as follows:
 
@@ -231,6 +276,7 @@ If you did not specify a prefix, the exchange will install to
 
 @subsection Installing the GNU Taler merchant backend
 
+@cindex backend
 The following steps assume all dependencies are installed.
 
 Use the following commands to download and install the
@@ -268,6 +314,8 @@ GNUnet to @code{/usr/local} in the previous steps.
 @node Installing Taler on Debian GNU/Linux
 @section Installing Taler on Debian GNU/Linux
 
+@cindex Wheezy
+@cindex Debian
 Debian wheezy is too old and lacks most of the packages required.
 
 On Debian jessie, only GNU libmicrohttpd needs to be compiled from
@@ -343,6 +391,8 @@ Debian wheezy instructions above, you need to pass
 @node Configuration
 @chapter How to configure the merchant's backend
 
+@cindex taler-config
+@cindex taler.conf
 The installation already provides reasonable defaults for most of the
 configuration options. However, some must be provided, in particular
 the database account and bank account that the backend should use.  By
@@ -365,8 +415,10 @@ Here, the notation @code{[$section]/$option} denotes the option
 @table @asis
 
 @item Service address
-The following option sets the transport layer address used by the Merchant backend:
+The following option sets the transport layer address used by the merchant backend:
 
+@cindex UNIX domain socket
+@cindex TCP
 @example
 [merchant]/serve = TCP | UNIX
 @end example
@@ -386,6 +438,7 @@ to the network.
 
 @c FIXME: we should offer an option to bind the TCP socket to a particular IP address (#4752)
 
+@cindex port
 To run the Taler backend on TCP port 8888, use:
 @example
 $ taler-config -s merchant -o serve -V TCP
@@ -396,6 +449,8 @@ $ taler-config -s merchant -o port -V 8888
 @item Currency
 Which currency the Web shop deals in, i.e. ``EUR'' or ``USD'', is specified using the option
 
+@cindex currency
+@cindex KUDOS
 @example
 [merchant]/currency
 @end example
@@ -407,8 +462,8 @@ with the Taler demonstration exchange at @url{https://exchange.demo.taler.net/}:
 $ taler-config -s merchant -o currency -V KUDOS
 @end example
 
-
 @item Database
+@cindex DBMS
 In principle is possible for the backend to support different DBMSs.
 The option
 
@@ -426,6 +481,7 @@ For postgres, you need to provide:
 @example
 [merchantdb-postgres]/config
 @end example
+@cindex Postgres
 
 This option specifies a postgres access path using the format
 @code{postgres:///$DBNAME}, where @code{$DBNAME} is the name of the Postgres
@@ -455,6 +511,7 @@ $ taler-config -s merchantdb-postgres -o CONFIG \
 
 
 @item Exchange
+@cindex exchange
 To add an exchange to the list of trusted payment service providers,
 you create a section with a name that starts with ``merchant-exchange-''.
 In that section, the following options need to be configured:
@@ -471,6 +528,7 @@ $ taler-config -s merchant-exchange-demo -o URI \
 @end example
 
 @item
+@cindex master key
 The ``master_key'' option specifies the exchange's master public key in base32 encoding.
 For the Taler demonstrator, use:
 
@@ -490,7 +548,7 @@ multiple currencies, you need to configure a backend per currency.
 @c @item Auditors
 
 @item Wireformat
-
+@cindex wire format
 In order to receive payments, the merchant backend needs to communicate bank
 account details to the exchange.  The banking system used is specified using the
 following global option:
@@ -510,7 +568,7 @@ Other wireformats will be supported in the future to interact with
 actual banks.
 
 @item Instances
-
+@cindex instance
 The backend allows the user to run multiple instances of shops with
 distinct business entities against a single backend.  Each instance
 uses its own bank account and key for signing contracts.  It is
@@ -560,6 +618,7 @@ in the section name instead of @code{default}.
 
 @section Sample backend configuration
 
+@cindex configuration
 The following is an example for a complete backend configuration:
 
 @smallexample
@@ -585,9 +644,8 @@ master_key = CQQZ9DY3MZ1ARMN5K1VKDETS04Y2QCKMMCFHZSWJWWVN82BTTH00
 @end smallexample
 
 
-
 Given the above configuration, the backend will use a database named
-@code{donations} within Postgresql.
+@code{donations} within Postgres.
 
 The backend will deposit the coins it receives to the exchange at
 @url{https://exchange.demo.taler.net/}, which has the master key @*
@@ -599,6 +657,8 @@ for each of them.
 
 @section Launching the backend
 
+@cindex backend
+@cindex taler-merchant-httpd
 Assuming you have configured everything correctly, you can launch the
 merchant backend using:
 
@@ -633,17 +693,18 @@ port.
 @c NOTE: include explaining wallet installation to sysadmin
 
 
-@c FIXME: this should be a separate manual
-
 @node Advanced topics
 @chapter Advanced topics
 
 @menu
 * Using taler-config::      Introduction to the taler-config tool
+* Key management::          Managing the merchant's cryptographic keys
+* SEPA configuration::      Configuring a SEPA bank account
 @end menu
 
 @node Using taler-config
 @section Using taler-config
+@cindex taler-config
 
 The tool @code{taler-config} can be used to
 extract or manipulate configuration values; however, the configuration
@@ -687,7 +748,10 @@ specified to @code{taler-merchant-httpd} and @code{taler-config} using
 the @code{-c} option.
 
 
+@node Key management
 @section Merchant key management
+@cindex merchant key
+@cindex KEYFILE
 
 The option ``KEYFILE'' in the section ``merchant-instance-default''
 specifies the path to the instance's private key.  You do not need to
@@ -704,25 +768,14 @@ $ gnunet-ecc -p                                  \
 
 @c Add more on how to add that key to X.509 CSRs once we can do that.
 
-
-
-
-
-@bye
-
-
-@node Advanced-topics
-@chapter Advanced topics
-
-This chapter includes draft texts for advanced topics which have
-not yet been properly integrated with the main text.
-
-
+@node SEPA configuration
 @section Using the SEPA wire transfer method
+@cindex SEPA
 
-Let's say that all the donations go to the following recipient,
-expressed in @code{SEPA} format@footnote{As said, supporting SEPA is still
-work in progress}.
+The following is a sample configuration for the SEPA wire transfer
+method:@footnote{Supporting SEPA is still
+work in progress; the backend will accept this configuration, but the
+exchange will not work with SEPA today.}.
 
 @verbatim
 {
@@ -735,4 +788,49 @@ work in progress}.
 
 @end verbatim
 
-Assume this information is stored in file @code{$DATADIR/sepa.json}.
+We will now assume that this information is stored in file @code{$@{DATADIR@}/sepa.json}.
+Then, to configure the backend for SEPA payments in EUR, the following configuration
+options need to be set:
+
+@example
+$ taler-config -s merchant -o currency -V EUR
+$ taler-config -s merchant -o wireformat -V sepa
+$ taler-config -s merchant-instance-wireformat-default \
+                -o sepa_response_file -V $@{DATADIR@}/sepa.json
+@end example
+
+Please note that you will also have to configure an exchange and/or
+auditors that support SEPA.  However, we cannot explain how to do this
+yet as such entities do not yet exist.  Once such entities do exist,
+we expect future versions of the Taler backend to ship with
+pre-configured exchanges and auditors for common denominations.
+
+
+@c **********************************************************
+@c *******************  Appendices  *************************
+@c **********************************************************
+
+@node GNU-LGPL
+@unnumbered GNU-LGPL
+@cindex license
+@cindex LGPL
+@include lgpl.texi
+
+@node GNU Affero GPL
+@unnumbered GNU Affero GPL
+@cindex license
+@cindex Affero GPL
+@include agpl.texi
+
+@node GNU-FDL
+@unnumbered GNU-FDL
+@cindex license
+@cindex GNU Free Documentation License
+@include fdl-1.3.texi
+
+@node Concept Index
+@unnumbered Concept Index
+
+@printindex cp
+
+@bye