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							- 
 -                 GNU Free Documentation License
 -                  Version 1.3, 3 November 2008
 - 
 - 
 -  Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
 -      <https://fsf.org/>
 -  Everyone is permitted to copy and distribute verbatim copies
 -  of this license document, but changing it is not allowed.
 - 
 - 0. PREAMBLE
 - 
 - The purpose of this License is to make a manual, textbook, or other
 - functional and useful document "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.
 - 
 - 
 - 1. 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
 - ASCII without markup, Texinfo input format, LaTeX input format, SGML
 - or XML using a publicly available DTD, and standard-conforming simple
 - HTML, PostScript or PDF designed for human modification.  Examples of
 - transparent image formats include PNG, XCF and JPG.  Opaque formats
 - include proprietary formats that can be read and edited only by
 - proprietary word processors, SGML or XML for which the DTD and/or
 - processing tools are not generally available, and the
 - machine-generated HTML, PostScript or 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.
 - 
 - 2. 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.
 - 
 - 
 - 3. 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.
 - 
 - 
 - 4. 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:
 - 
 - A. 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.
 - B. 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.
 - C. State on the Title page the name of the publisher of the
 -    Modified Version, as the publisher.
 - D. Preserve all the copyright notices of the Document.
 - E. Add an appropriate copyright notice for your modifications
 -    adjacent to the other copyright notices.
 - F. 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.
 - G. Preserve in that license notice the full lists of Invariant Sections
 -    and required Cover Texts given in the Document's license notice.
 - H. Include an unaltered copy of this License.
 - I. 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.
 - J. 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.
 - K. 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.
 - L. 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.
 - M. Delete any section Entitled "Endorsements".  Such a section
 -    may not be included in the Modified Version.
 - N. Do not retitle any existing section to be Entitled "Endorsements"
 -    or to conflict in title with any Invariant Section.
 - O. Preserve any Warranty Disclaimers.
 - 
 - 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.
 - 
 - 
 - 5. 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".
 - 
 - 
 - 6. 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.
 - 
 - 
 - 7. 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.
 - 
 - 
 - 8. 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.
 - 
 - 
 - 9. 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.
 - 
 - 
 - 10. 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
 - https://www.gnu.org/licenses/.
 - 
 - 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.
 - 
 - 11. 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.
 - 
 - 
 - 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:
 - 
 -     Copyright (c)  YEAR  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".
 - 
 - If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
 - replace the "with...Texts." line with this:
 - 
 -     with the Invariant Sections being LIST THEIR TITLES, with the
 -     Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
 - 
 - 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.
 
 
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