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0001 GNU GENERAL PUBLIC LICENSE 0002 Version 3, 29 June 2007 0003 0004 Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/> 0005 0006 Everyone is permitted to copy and distribute verbatim copies of this license 0007 document, but changing it is not allowed. 0008 0009 Preamble 0010 0011 The GNU General Public License is a free, copyleft license for software and 0012 other kinds of works. 0013 0014 The licenses for most software and other practical works are designed to take 0015 away your freedom to share and change the works. By contrast, the GNU General 0016 Public License is intended to guarantee your freedom to share and change all 0017 versions of a program--to make sure it remains free software for all its users. 0018 We, the Free Software Foundation, use the GNU General Public License for most 0019 of our software; it applies also to any other work released this way by its 0020 authors. You can apply it to your programs, too. 0021 0022 When we speak of free software, we are referring to freedom, not price. Our 0023 General Public Licenses are designed to make sure that you have the freedom 0024 to distribute copies of free software (and charge for them if you wish), that 0025 you receive source code or can get it if you want it, that you can change 0026 the software or use pieces of it in new free programs, and that you know you 0027 can do these things. 0028 0029 To protect your rights, we need to prevent others from denying you these rights 0030 or asking you to surrender the rights. Therefore, you have certain responsibilities 0031 if you distribute copies of the software, or if you modify it: responsibilities 0032 to respect the freedom of others. 0033 0034 For example, if you distribute copies of such a program, whether gratis or 0035 for a fee, you must pass on to the recipients the same freedoms that you received. 0036 You must make sure that they, too, receive or can get the source code. And 0037 you must show them these terms so they know their rights. 0038 0039 Developers that use the GNU GPL protect your rights with two steps: (1) assert 0040 copyright on the software, and (2) offer you this License giving you legal 0041 permission to copy, distribute and/or modify it. 0042 0043 For the developers' and authors' protection, the GPL clearly explains that 0044 there is no warranty for this free software. For both users' and authors' 0045 sake, the GPL requires that modified versions be marked as changed, so that 0046 their problems will not be attributed erroneously to authors of previous versions. 0047 0048 Some devices are designed to deny users access to install or run modified 0049 versions of the software inside them, although the manufacturer can do so. 0050 This is fundamentally incompatible with the aim of protecting users' freedom 0051 to change the software. The systematic pattern of such abuse occurs in the 0052 area of products for individuals to use, which is precisely where it is most 0053 unacceptable. Therefore, we have designed this version of the GPL to prohibit 0054 the practice for those products. If such problems arise substantially in other 0055 domains, we stand ready to extend this provision to those domains in future 0056 versions of the GPL, as needed to protect the freedom of users. 0057 0058 Finally, every program is threatened constantly by software patents. States 0059 should not allow patents to restrict development and use of software on general-purpose 0060 computers, but in those that do, we wish to avoid the special danger that 0061 patents applied to a free program could make it effectively proprietary. To 0062 prevent this, the GPL assures that patents cannot be used to render the program 0063 non-free. 0064 0065 The precise terms and conditions for copying, distribution and modification 0066 follow. 0067 0068 TERMS AND CONDITIONS 0069 0070 0. Definitions. 0071 0072 “This License” refers to version 3 of the GNU General Public License. 0073 0074 “Copyright” also means copyright-like laws that apply to other kinds of works, 0075 such as semiconductor masks. 0076 0077 “The Program” refers to any copyrightable work licensed under this License. 0078 Each licensee is addressed as “you”. “Licensees” and “recipients” may be individuals 0079 or organizations. 0080 0081 To “modify” a work means to copy from or adapt all or part of the work in 0082 a fashion requiring copyright permission, other than the making of an exact 0083 copy. The resulting work is called a “modified version” of the earlier work 0084 or a work “based on” the earlier work. 0085 0086 A “covered work” means either the unmodified Program or a work based on the 0087 Program. 0088 0089 To “propagate” a work means to do anything with it that, without permission, 0090 would make you directly or secondarily liable for infringement under applicable 0091 copyright law, except executing it on a computer or modifying a private copy. 0092 Propagation includes copying, distribution (with or without modification), 0093 making available to the public, and in some countries other activities as 0094 well. 0095 0096 To “convey” a work means any kind of propagation that enables other parties 0097 to make or receive copies. Mere interaction with a user through a computer 0098 network, with no transfer of a copy, is not conveying. 0099 0100 An interactive user interface displays “Appropriate Legal Notices” to the 0101 extent that it includes a convenient and prominently visible feature that 0102 (1) displays an appropriate copyright notice, and (2) tells the user that 0103 there is no warranty for the work (except to the extent that warranties are 0104 provided), that licensees may convey the work under this License, and how 0105 to view a copy of this License. If the interface presents a list of user commands 0106 or options, such as a menu, a prominent item in the list meets this criterion. 0107 0108 1. Source Code. 0109 The “source code” for a work means the preferred form of the work for making 0110 modifications to it. “Object code” means any non-source form of a work. 0111 0112 A “Standard Interface” means an interface that either is an official standard 0113 defined by a recognized standards body, or, in the case of interfaces specified 0114 for a particular programming language, one that is widely used among developers 0115 working in that language. 0116 0117 The “System Libraries” of an executable work include anything, other than 0118 the work as a whole, that (a) is included in the normal form of packaging 0119 a Major Component, but which is not part of that Major Component, and (b) 0120 serves only to enable use of the work with that Major Component, or to implement 0121 a Standard Interface for which an implementation is available to the public 0122 in source code form. 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The output from running a covered work is covered by this License 0149 only if the output, given its content, constitutes a covered work. This License 0150 acknowledges your rights of fair use or other equivalent, as provided by copyright 0151 law. 0152 0153 You may make, run and propagate covered works that you do not convey, without 0154 conditions so long as your license otherwise remains in force. You may convey 0155 covered works to others for the sole purpose of having them make modifications 0156 exclusively for you, or provide you with facilities for running those works, 0157 provided that you comply with the terms of this License in conveying all material 0158 for which you do not control copyright. 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Conveying Modified Source Versions. 0191 You may convey a work based on the Program, or the modifications to produce 0192 it from the Program, in the form of source code under the terms of section 0193 4, provided that you also meet all of these conditions: 0194 0195 a) The work must carry prominent notices stating that you modified it, and 0196 giving a relevant date. 0197 0198 b) The work must carry prominent notices stating that it is released under 0199 this License and any conditions added under section 7. This requirement modifies 0200 the requirement in section 4 to “keep intact all notices”. 0201 0202 c) You must license the entire work, as a whole, under this License to anyone 0203 who comes into possession of a copy. This License will therefore apply, along 0204 with any applicable section 7 additional terms, to the whole of the work, 0205 and all its parts, regardless of how they are packaged. 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This alternative is allowed only 0243 occasionally and noncommercially, and only if you received the object code 0244 with such an offer, in accord with subsection 6b. 0245 0246 d) Convey the object code by offering access from a designated place (gratis 0247 or for a charge), and offer equivalent access to the Corresponding Source 0248 in the same way through the same place at no further charge. You need not 0249 require recipients to copy the Corresponding Source along with the object 0250 code. If the place to copy the object code is a network server, the Corresponding 0251 Source may be on a different server (operated by you or a third party) that 0252 supports equivalent copying facilities, provided you maintain clear directions 0253 next to the object code saying where to find the Corresponding Source. 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If additional permissions apply only to part of the Program, that part 0313 may be used separately under those permissions, but the entire Program remains 0314 governed by this License without regard to the additional permissions. 0315 0316 When you convey a copy of a covered work, you may at your option remove any 0317 additional permissions from that copy, or from any part of it. (Additional 0318 permissions may be written to require their own removal in certain cases when 0319 you modify the work.) You may place additional permissions on material, added 0320 by you to a covered work, for which you have or can give appropriate copyright 0321 permission. 0322 0323 Notwithstanding any other provision of this License, for material you add 0324 to a covered work, you may (if authorized by the copyright holders of that 0325 material) supplement the terms of this License with terms: 0326 0327 a) Disclaiming warranty or limiting liability differently from the terms of 0328 sections 15 and 16 of this License; or 0329 0330 b) Requiring preservation of specified reasonable legal notices or author 0331 attributions in that material or in the Appropriate Legal Notices displayed 0332 by works containing it; or 0333 0334 c) Prohibiting misrepresentation of the origin of that material, or requiring 0335 that modified versions of such material be marked in reasonable ways as different 0336 from the original version; or 0337 0338 d) Limiting the use for publicity purposes of names of licensors or authors 0339 of the material; or 0340 0341 e) Declining to grant rights under trademark law for use of some trade names, 0342 trademarks, or service marks; or 0343 0344 f) Requiring indemnification of licensors and authors of that material by 0345 anyone who conveys the material (or modified versions of it) with contractual 0346 assumptions of liability to the recipient, for any liability that these contractual 0347 assumptions directly impose on those licensors and authors. 0348 0349 All other non-permissive additional terms are considered “further restrictions” 0350 within the meaning of section 10. If the Program as you received it, or any 0351 part of it, contains a notice stating that it is governed by this License 0352 along with a term that is a further restriction, you may remove that term. 0353 If a license document contains a further restriction but permits relicensing 0354 or conveying under this License, you may add to a covered work material governed 0355 by the terms of that license document, provided that the further restriction 0356 does not survive such relicensing or conveying. 0357 0358 If you add terms to a covered work in accord with this section, you must place, 0359 in the relevant source files, a statement of the additional terms that apply 0360 to those files, or a notice indicating where to find the applicable terms. 0361 0362 Additional terms, permissive or non-permissive, may be stated in the form 0363 of a separately written license, or stated as exceptions; the above requirements 0364 apply either way. 0365 0366 8. Termination. 0367 You may not propagate or modify a covered work except as expressly provided 0368 under this License. Any attempt otherwise to propagate or modify it is void, 0369 and will automatically terminate your rights under this License (including 0370 any patent licenses granted under the third paragraph of section 11). 0371 0372 However, if you cease all violation of this License, then your license from 0373 a particular copyright holder is reinstated (a) provisionally, unless and 0374 until the copyright holder explicitly and finally terminates your license, 0375 and (b) permanently, if the copyright holder fails to notify you of the violation 0376 by some reasonable means prior to 60 days after the cessation. 0377 0378 Moreover, your license from a particular copyright holder is reinstated permanently 0379 if the copyright holder notifies you of the violation by some reasonable means, 0380 this is the first time you have received notice of violation of this License 0381 (for any work) from that copyright holder, and you cure the violation prior 0382 to 30 days after your receipt of the notice. 0383 0384 Termination of your rights under this section does not terminate the licenses 0385 of parties who have received copies or rights from you under this License. 0386 If your rights have been terminated and not permanently reinstated, you do 0387 not qualify to receive new licenses for the same material under section 10. 0388 0389 9. Acceptance Not Required for Having Copies. 0390 You are not required to accept this License in order to receive or run a copy 0391 of the Program. Ancillary propagation of a covered work occurring solely as 0392 a consequence of using peer-to-peer transmission to receive a copy likewise 0393 does not require acceptance. However, nothing other than this License grants 0394 you permission to propagate or modify any covered work. These actions infringe 0395 copyright if you do not accept this License. Therefore, by modifying or propagating 0396 a covered work, you indicate your acceptance of this License to do so. 0397 0398 10. Automatic Licensing of Downstream Recipients. 0399 Each time you convey a covered work, the recipient automatically receives 0400 a license from the original licensors, to run, modify and propagate that work, 0401 subject to this License. You are not responsible for enforcing compliance 0402 by third parties with this License. 0403 0404 An “entity transaction” is a transaction transferring control of an organization, 0405 or substantially all assets of one, or subdividing an organization, or merging 0406 organizations. If propagation of a covered work results from an entity transaction, 0407 each party to that transaction who receives a copy of the work also receives 0408 whatever licenses to the work the party's predecessor in interest had or could 0409 give under the previous paragraph, plus a right to possession of the Corresponding 0410 Source of the work from the predecessor in interest, if the predecessor has 0411 it or can get it with reasonable efforts. 0412 0413 You may not impose any further restrictions on the exercise of the rights 0414 granted or affirmed under this License. For example, you may not impose a 0415 license fee, royalty, or other charge for exercise of rights granted under 0416 this License, and you may not initiate litigation (including a cross-claim 0417 or counterclaim in a lawsuit) alleging that any patent claim is infringed 0418 by making, using, selling, offering for sale, or importing the Program or 0419 any portion of it. 0420 0421 11. Patents. 0422 A “contributor” is a copyright holder who authorizes use under this License 0423 of the Program or a work on which the Program is based. The work thus licensed 0424 is called the contributor's “contributor version”. 0425 0426 A contributor's “essential patent claims” are all patent claims owned or controlled 0427 by the contributor, whether already acquired or hereafter acquired, that would 0428 be infringed by some manner, permitted by this License, of making, using, 0429 or selling its contributor version, but do not include claims that would be 0430 infringed only as a consequence of further modification of the contributor 0431 version. For purposes of this definition, “control” includes the right to 0432 grant patent sublicenses in a manner consistent with the requirements of this 0433 License. 0434 0435 Each contributor grants you a non-exclusive, worldwide, royalty-free patent 0436 license under the contributor's essential patent claims, to make, use, sell, 0437 offer for sale, import and otherwise run, modify and propagate the contents 0438 of its contributor version. 0439 0440 In the following three paragraphs, a “patent license” is any express agreement 0441 or commitment, however denominated, not to enforce a patent (such as an express 0442 permission to practice a patent or covenant not to sue for patent infringement). 0443 To “grant” such a patent license to a party means to make such an agreement 0444 or commitment not to enforce a patent against the party. 0445 0446 If you convey a covered work, knowingly relying on a patent license, and the 0447 Corresponding Source of the work is not available for anyone to copy, free 0448 of charge and under the terms of this License, through a publicly available 0449 network server or other readily accessible means, then you must either (1) 0450 cause the Corresponding Source to be so available, or (2) arrange to deprive 0451 yourself of the benefit of the patent license for this particular work, or 0452 (3) arrange, in a manner consistent with the requirements of this License, 0453 to extend the patent license to downstream recipients. “Knowingly relying” 0454 means you have actual knowledge that, but for the patent license, your conveying 0455 the covered work in a country, or your recipient's use of the covered work 0456 in a country, would infringe one or more identifiable patents in that country 0457 that you have reason to believe are valid. 0458 0459 If, pursuant to or in connection with a single transaction or arrangement, 0460 you convey, or propagate by procuring conveyance of, a covered work, and grant 0461 a patent license to some of the parties receiving the covered work authorizing 0462 them to use, propagate, modify or convey a specific copy of the covered work, 0463 then the patent license you grant is automatically extended to all recipients 0464 of the covered work and works based on it. 0465 0466 A patent license is “discriminatory” if it does not include within the scope 0467 of its coverage, prohibits the exercise of, or is conditioned on the non-exercise 0468 of one or more of the rights that are specifically granted under this License. 0469 You may not convey a covered work if you are a party to an arrangement with 0470 a third party that is in the business of distributing software, under which 0471 you make payment to the third party based on the extent of your activity of 0472 conveying the work, and under which the third party grants, to any of the 0473 parties who would receive the covered work from you, a discriminatory patent 0474 license (a) in connection with copies of the covered work conveyed by you 0475 (or copies made from those copies), or (b) primarily for and in connection 0476 with specific products or compilations that contain the covered work, unless 0477 you entered into that arrangement, or that patent license was granted, prior 0478 to 28 March 2007. 0479 0480 Nothing in this License shall be construed as excluding or limiting any implied 0481 license or other defenses to infringement that may otherwise be available 0482 to you under applicable patent law. 0483 0484 12. No Surrender of Others' Freedom. 0485 If conditions are imposed on you (whether by court order, agreement or otherwise) 0486 that contradict the conditions of this License, they do not excuse you from 0487 the conditions of this License. If you cannot convey a covered work so as 0488 to satisfy simultaneously your obligations under this License and any other 0489 pertinent obligations, then as a consequence you may not convey it at all. 0490 For example, if you agree to terms that obligate you to collect a royalty 0491 for further conveying from those to whom you convey the Program, the only 0492 way you could satisfy both those terms and this License would be to refrain 0493 entirely from conveying the Program. 0494 0495 13. Use with the GNU Affero General Public License. 0496 Notwithstanding any other provision of this License, you have permission to 0497 link or combine any covered work with a work licensed under version 3 of the 0498 GNU Affero General Public License into a single combined work, and to convey 0499 the resulting work. The terms of this License will continue to apply to the 0500 part which is the covered work, but the special requirements of the GNU Affero 0501 General Public License, section 13, concerning interaction through a network 0502 will apply to the combination as such. 0503 0504 14. Revised Versions of this License. 0505 The Free Software Foundation may publish revised and/or new versions of the 0506 GNU General Public License from time to time. Such new versions will be similar 0507 in spirit to the present version, but may differ in detail to address new 0508 problems or concerns. 0509 0510 Each version is given a distinguishing version number. If the Program specifies 0511 that a certain numbered version of the GNU General Public License “or any 0512 later version” applies to it, you have the option of following the terms and 0513 conditions either of that numbered version or of any later version published 0514 by the Free Software Foundation. If the Program does not specify a version 0515 number of the GNU General Public License, you may choose any version ever 0516 published by the Free Software Foundation. 0517 0518 If the Program specifies that a proxy can decide which future versions of 0519 the GNU General Public License can be used, that proxy's public statement 0520 of acceptance of a version permanently authorizes you to choose that version 0521 for the Program. 0522 0523 Later license versions may give you additional or different permissions. However, 0524 no additional obligations are imposed on any author or copyright holder as 0525 a result of your choosing to follow a later version. 0526 0527 15. Disclaimer of Warranty. 0528 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE 0529 LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 0530 OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER 0531 EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 0532 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 0533 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM 0534 PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR 0535 CORRECTION. 0536 0537 16. Limitation of Liability. 0538 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL 0539 ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM 0540 AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, 0541 INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO 0542 USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED 0543 INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE 0544 PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER 0545 PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 0546 0547 17. Interpretation of Sections 15 and 16. 0548 If the disclaimer of warranty and limitation of liability provided above cannot 0549 be given local legal effect according to their terms, reviewing courts shall 0550 apply local law that most closely approximates an absolute waiver of all civil 0551 liability in connection with the Program, unless a warranty or assumption 0552 of liability accompanies a copy of the Program in return for a fee. 0553 0554 END OF TERMS AND CONDITIONS 0555 0556 How to Apply These Terms to Your New Programs 0557 0558 If you develop a new program, and you want it to be of the greatest possible 0559 use to the public, the best way to achieve this is to make it free software 0560 which everyone can redistribute and change under these terms. 0561 0562 To do so, attach the following notices to the program. It is safest to attach 0563 them to the start of each source file to most effectively state the exclusion 0564 of warranty; and each file should have at least the “copyright” line and a 0565 pointer to where the full notice is found. 0566 0567 <one line to give the program's name and a brief idea of what it does.> 0568 Copyright (C) <year> <name of author> 0569 0570 This program is free software: you can redistribute it and/or modify it under 0571 the terms of the GNU General Public License as published by the Free Software 0572 Foundation, either version 3 of the License, or (at your option) any later 0573 version. 0574 0575 This program is distributed in the hope that it will be useful, but WITHOUT 0576 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 0577 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 0578 0579 You should have received a copy of the GNU General Public License along with 0580 this program. If not, see <http://www.gnu.org/licenses/>. 0581 0582 Also add information on how to contact you by electronic and paper mail. 0583 0584 If the program does terminal interaction, make it output a short notice like 0585 this when it starts in an interactive mode: 0586 0587 <program> Copyright (C) <year> <name of author> 0588 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 0589 This is free software, and you are welcome to redistribute it under certain 0590 conditions; type `show c' for details. 0591 0592 The hypothetical commands `show w' and `show c' should show the appropriate 0593 parts of the General Public License. Of course, your program's commands might 0594 be different; for a GUI interface, you would use an “about box”. 0595 0596 You should also get your employer (if you work as a programmer) or school, 0597 if any, to sign a “copyright disclaimer” for the program, if necessary. For 0598 more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>. 0599 0600 The GNU General Public License does not permit incorporating your program 0601 into proprietary programs. If your program is a subroutine library, you may 0602 consider it more useful to permit linking proprietary applications with the 0603 library. If this is what you want to do, use the GNU Lesser General Public 0604 License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.