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diff --git a/doc/COPYING b/doc/COPYING new file mode 100644 index 0000000..5056c63 --- /dev/null +++ b/doc/COPYING @@ -0,0 +1,641 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + +Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/> + + Everyone is permitted to copy and distribute verbatim copies of this +license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for software and +other kinds of works. + + The licenses for most software and other practical works are designed to +take away your freedom to share and change the works. By contrast, the GNU +General Public License is 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. We, the Free Software Foundation, use the GNU General Public License for +most of our software; it applies also to any other work released this way by its +authors. You can apply it to your programs, too. + + 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. + + To protect your rights, we need to prevent others from denying you these +rights or asking you to surrender the rights. Therefore, you have certain +responsibilities if you distribute copies of the software, or if you modify it: +responsibilities to respect the freedom of others. + + For example, if you distribute copies of such a program, whether gratis or +for a fee, you must pass on to the recipients the same freedoms that you +received. You must make sure that they, too, receive or can get the source code. +And you must show them these terms so they know their rights. + + Developers that use the GNU GPL protect your rights with two steps: (1) +assert copyright on the software, and (2) offer you this License giving you +legal permission to copy, distribute and/or modify it. + + For the developers' and authors' protection, the GPL clearly explains that +there is no warranty for this free software. For both users' and authors' sake, +the GPL requires that modified versions be marked as changed, so that their +problems will not be attributed erroneously to authors of previous versions. + + Some devices are designed to deny users access to install or run modified +versions of the software inside them, although the manufacturer can do so. This +is fundamentally incompatible with the aim of protecting users' freedom to +change the software. The systematic pattern of such abuse occurs in the area of +products for individuals to use, which is precisely where it is most +unacceptable. Therefore, we have designed this version of the GPL to prohibit +the practice for those products. If such problems arise substantially in other +domains, we stand ready to extend this provision to those domains in future +versions of the GPL, as needed to protect the freedom of users. + + Finally, every program is threatened constantly by software patents. States +should not allow patents to restrict development and use of software on +general-purpose computers, but in those that do, we wish to avoid the special +danger that patents applied to a free program could make it effectively +proprietary. To prevent this, the GPL assures that patents cannot be used to +render the program non-free. + + The precise terms and conditions for copying, distribution and modification +follow. + + TERMS AND CONDITIONS + +0. Definitions. +--------------- + + “This License” refers to version 3 of the GNU General Public License. + + “Copyright” also means copyright-like laws that apply to other kinds of +works, such as semiconductor masks. + + “The Program” refers to any copyrightable work licensed under this License. +Each licensee is addressed as “you”. “Licensees” and “recipients” may be +individuals or organizations. + + To “modify” a work means to copy from or adapt all or part of the work in a +fashion requiring copyright permission, other than the making of an exact copy. +The resulting work is called a “modified version” of the earlier work or a work +“based on” the earlier work. + + A “covered work” means either the unmodified Program or a work based on the +Program. + + To “propagate” a work means to do anything with it that, without permission, +would make you directly or secondarily liable for infringement under applicable +copyright law, except executing it on a computer or modifying a private copy. +Propagation includes copying, distribution (with or without modification), +making available to the public, and in some countries other activities as well. + + To “convey” a work means any kind of propagation that enables other parties +to make or receive copies. Mere interaction with a user through a computer +network, with no transfer of a copy, is not conveying. + + An interactive user interface displays “Appropriate Legal Notices” to the +extent that it includes a convenient and prominently visible feature that (1) +displays an appropriate copyright notice, and (2) tells the user that there is +no warranty for the work (except to the extent that warranties are provided), +that licensees may convey the work under this License, and how to view a copy of +this License. If the interface presents a list of user commands or options, such +as a menu, a prominent item in the list meets this criterion. + + +1. 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Conveying Non-Source Forms. +------------------------------ + + You may convey a covered work in object code form under the terms of +sections 4 and 5, provided that you also convey the machine-readable +Corresponding Source under the terms of this License, in one of these ways: + + a) Convey the object code in, or embodied in, a physical product (including + a physical distribution medium), accompanied by the Corresponding Source + fixed on a durable physical medium customarily used for software + interchange. + b) Convey the object code in, or embodied in, a physical product (including + a physical distribution medium), accompanied by a written offer, valid + for at least three years and valid for as long as you offer spare parts + or customer support for that product model, to give anyone who possesses + the object code either (1) a copy of the Corresponding Source for all the + software in the product that is covered by this License, on a durable + physical medium customarily used for software interchange, for a price no + more than your reasonable cost of physically performing this conveying of + source, or (2) access to copy the Corresponding Source from a network + server at no charge. + c) Convey individual copies of the object code with a copy of the written + offer to provide the Corresponding Source. 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Additional Terms. +-------------------- + + “Additional permissions” are terms that supplement the terms of this License +by making exceptions from one or more of its conditions. Additional permissions +that are applicable to the entire Program shall be treated as though they were +included in this License, to the extent that they are valid under applicable +law. If additional permissions apply only to part of the Program, that part may +be used separately under those permissions, but the entire Program remains +governed by this License without regard to the additional permissions. + + When you convey a copy of a covered work, you may at your option remove any +additional permissions from that copy, or from any part of it. (Additional +permissions may be written to require their own removal in certain cases when +you modify the work.) You may place additional permissions on material, added by +you to a covered work, for which you have or can give appropriate copyright +permission. + + Notwithstanding any other provision of this License, for material you add to +a covered work, you may (if authorized by the copyright holders of that +material) supplement the terms of this License with terms: + + a) Disclaiming warranty or limiting liability differently from the terms of + sections 15 and 16 of this License; or + b) Requiring preservation of specified reasonable legal notices or author + attributions in that material or in the Appropriate Legal Notices + displayed by works containing it; or + c) Prohibiting misrepresentation of the origin of that material, or + requiring that modified versions of such material be marked in reasonable + ways as different from the original version; or + d) Limiting the use for publicity purposes of names of licensors or authors + of the material; or + e) Declining to grant rights under trademark law for use of some trade + names, trademarks, or service marks; or + f) Requiring indemnification of licensors and authors of that material by + anyone who conveys the material (or modified versions of it) with + contractual assumptions of liability to the recipient, for any liability + that these contractual assumptions directly impose on those licensors and + authors. + + All other non-permissive additional terms are considered “further +restrictions” within the meaning of section 10. If the Program as you received +it, or any part of it, contains a notice stating that it is governed by this +License along with a term that is a further restriction, you may remove that +term. If a license document contains a further restriction but permits +relicensing or conveying under this License, you may add to a covered work +material governed by the terms of that license document, provided that the +further restriction does not survive such relicensing or conveying. + + If you add terms to a covered work in accord with this section, you must +place, in the relevant source files, a statement of the additional terms that +apply to those files, or a notice indicating where to find the applicable terms. + + Additional terms, permissive or non-permissive, may be stated in the form of +a separately written license, or stated as exceptions; the above requirements +apply either way. + +8. Termination. +--------------- + + You may not propagate or modify a covered work except as expressly provided +under this License. Any attempt otherwise to propagate or modify it is void, and +will automatically terminate your rights under this License (including any +patent licenses granted under the third paragraph of section 11). + + 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, you +do not qualify to receive new licenses for the same material under section 10. + +9. Acceptance Not Required for Having Copies. +--------------------------------------------- + + You are not required to accept this License in order to receive or run a +copy of the Program. Ancillary propagation of a covered work occurring solely as +a consequence of using peer-to-peer transmission to receive a copy likewise does +not require acceptance. However, nothing other than this License grants you +permission to propagate or modify any covered work. These actions infringe +copyright if you do not accept this License. Therefore, by modifying or +propagating a covered work, you indicate your acceptance of this License to +do so. + +10. Automatic Licensing of Downstream Recipients. +------------------------------------------------- + + Each time you convey a covered work, the recipient automatically receives a +license from the original licensors, to run, modify and propagate that work, +subject to this License. You are not responsible for enforcing compliance by +third parties with this License. + + An “entity transaction” is a transaction transferring control of an +organization, or substantially all assets of one, or subdividing an +organization, or merging organizations. If propagation of a covered work results +from an entity transaction, each party to that transaction who receives a copy +of the work also receives whatever licenses to the work the party's predecessor +in interest had or could give under the previous paragraph, plus a right to +possession of the Corresponding Source of the work from the predecessor in +interest, if the predecessor has it or can get it with reasonable efforts. + + You may not impose any further restrictions on the exercise of the rights +granted or affirmed under this License. For example, you may not impose a +license fee, royalty, or other charge for exercise of rights granted under this +License, and you may not initiate litigation (including a cross-claim or +counterclaim in a lawsuit) alleging that any patent claim is infringed by +making, using, selling, offering for sale, or importing the Program or any +portion of it. + +11. Patents. +------------ + + A “contributor” is a copyright holder who authorizes use under this License +of the Program or a work on which the Program is based. The work thus licensed +is called the contributor's “contributor version”. + + A contributor's “essential patent claims” are all patent claims owned or +controlled by the contributor, whether already acquired or hereafter acquired, +that would be infringed by some manner, permitted by this License, of making, +using, or selling its contributor version, but do not include claims that would +be infringed only as a consequence of further modification of the contributor +version. For purposes of this definition, “control” includes the right to grant +patent sublicenses in a manner consistent with the requirements of this License. + + Each contributor grants you a non-exclusive, worldwide, royalty-free patent +license under the contributor's essential patent claims, to make, use, sell, +offer for sale, import and otherwise run, modify and propagate the contents of +its contributor version. + + In the following three paragraphs, a “patent license” is any express +agreement or commitment, however denominated, not to enforce a patent (such as +an express permission to practice a patent or covenant not to sue for patent +infringement). To “grant” such a patent license to a party means to make such an +agreement or commitment not to enforce a patent against the party. + + If you convey a covered work, knowingly relying on a patent license, and the +Corresponding Source of the work is not available for anyone to copy, free of +charge and under the terms of this License, through a publicly available network +server or other readily accessible means, then you must either (1) cause the +Corresponding Source to be so available, or (2) arrange to deprive yourself of +the benefit of the patent license for this particular work, or (3) arrange, in a +manner consistent with the requirements of this License, to extend the patent +license to downstream recipients. “Knowingly relying” means you have actual +knowledge that, but for the patent license, your conveying the covered work in a +country, or your recipient's use of the covered work in a country, would +infringe one or more identifiable patents in that country that you have reason +to believe are valid. + + If, pursuant to or in connection with a single transaction or arrangement, +you convey, or propagate by procuring conveyance of, a covered work, and grant a +patent license to some of the parties receiving the covered work authorizing +them to use, propagate, modify or convey a specific copy of the covered work, +then the patent license you grant is automatically extended to all recipients of +the covered work and works based on it. + + A patent license is “discriminatory” if it does not include within the scope +of its coverage, prohibits the exercise of, or is conditioned on the +non-exercise of one or more of the rights that are specifically granted under +this License. You may not convey a covered work if you are a party to an +arrangement with a third party that is in the business of distributing software, +under which you make payment to the third party based on the extent of your +activity of conveying the work, and under which the third party grants, to any +of the parties who would receive the covered work from you, a discriminatory +patent license (a) in connection with copies of the covered work conveyed by you +(or copies made from those copies), or (b) primarily for and in connection with +specific products or compilations that contain the covered work, unless you +entered into that arrangement, or that patent license was granted, prior to +28 March 2007. + + Nothing in this License shall be construed as excluding or limiting any +implied license or other defenses to infringement that may otherwise be +available to you under applicable patent law. + +12. No Surrender of Others' Freedom. +------------------------------------ + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not excuse +you from the conditions of this License. If you cannot convey a covered work so +as to satisfy simultaneously your obligations under this License and any other +pertinent obligations, then as a consequence you may not convey it at all. For +example, if you agree to terms that obligate you to collect a royalty for +further conveying from those to whom you convey the Program, the only way you +could satisfy both those terms and this License would be to refrain entirely +from conveying the Program. + +13. Use with the GNU Affero General Public License. +--------------------------------------------------- + + Notwithstanding any other provision of this License, you have permission to +link or combine any covered work with a work licensed under version 3 of the GNU +Affero General Public License into a single combined work, and to convey the +resulting work. The terms of this License will continue to apply to the part +which is the covered work, but the special requirements of the GNU Affero +General Public License, section 13, concerning interaction through a network +will apply to the combination as such. + +14. Revised Versions of this License. +------------------------------------- + + The Free Software Foundation may publish revised and/or new versions of the +GNU General Public 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. + + Each version is given a distinguishing version number. If the Program +specifies that a certain numbered version of the GNU General Public License +“or any later version” applies to it, you have the option of 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 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 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. + +15. 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. + +16. 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. + +17. 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 OF TERMS AND CONDITIONS + + + 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. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + + +Also add information on how to contact you by electronic and paper mail. + + + If the program does terminal interaction, make it output a short notice +like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + + + The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands might be +different; for a GUI interface, you would use an “about box”. + + 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 GPL, see +<http://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General Public +License instead of this License. But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. |