--- /dev/null
+[[!meta title="Licensing"]]
+This website is copyright © 2004-2009 by the scripts.mit.edu team.
+
+Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License,
+Version 1.2, with no Invariant Sections, no Front-Cover Texts, and
+no Back-Cover Texts, or under the terms of the
+[Creative Commons Attribution-Share Alike 3.0 United States License](http://creativecommons.org/licenses/by-sa/3.0/us/).
+A copy of the first license follows.
+
+### GNU Free Documentation License
+
+Version 1.2, November 2002
+
+Copyright © 2000,2001,2002 Free Software Foundation, Inc.
+51 Franklin St, 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.
+
+### 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.
+
+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 for under this License. Any other
+attempt to copy, modify, sublicense or distribute the Document is
+void, and will automatically terminate your rights under this
+License. However, parties who have received copies, or rights, from
+you under this License will not have their licenses terminated so
+long as such parties remain in full compliance.
+
+### 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
+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.
+
+
+
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