1### GNU GENERAL PUBLIC LICENSE23Version 3, 29 June 200745Copyright (C) 2007 Free Software Foundation, Inc.6<https://fsf.org/>78Everyone is permitted to copy and distribute verbatim copies of this9license document, but changing it is not allowed.1011### Preamble1213The GNU General Public License is a free, copyleft license for14software and other kinds of works.1516The licenses for most software and other practical works are designed17to take away your freedom to share and change the works. By contrast,18the GNU General Public License is intended to guarantee your freedom19to share and change all versions of a program--to make sure it remains20free software for all its users. We, the Free Software Foundation, use21the GNU General Public License for most of our software; it applies22also to any other work released this way by its authors. You can apply23it to your programs, too.2425When we speak of free software, we are referring to freedom, not26price. Our General Public Licenses are designed to make sure that you27have the freedom to distribute copies of free software (and charge for28them if you wish), that you receive source code or can get it if you29want it, that you can change the software or use pieces of it in new30free programs, and that you know you can do these things.3132To protect your rights, we need to prevent others from denying you33these rights or asking you to surrender the rights. Therefore, you34have certain responsibilities if you distribute copies of the35software, or if you modify it: responsibilities to respect the freedom36of others.3738For example, if you distribute copies of such a program, whether39gratis or for a fee, you must pass on to the recipients the same40freedoms that you received. You must make sure that they, too, receive41or can get the source code. And you must show them these terms so they42know their rights.4344Developers that use the GNU GPL protect your rights with two steps:45(1) assert copyright on the software, and (2) offer you this License46giving you legal permission to copy, distribute and/or modify it.4748For the developers' and authors' protection, the GPL clearly explains49that there is no warranty for this free software. For both users' and50authors' sake, the GPL requires that modified versions be marked as51changed, so that their problems will not be attributed erroneously to52authors of previous versions.5354Some devices are designed to deny users access to install or run55modified versions of the software inside them, although the56manufacturer can do so. This is fundamentally incompatible with the57aim of protecting users' freedom to change the software. The58systematic pattern of such abuse occurs in the area of products for59individuals to use, which is precisely where it is most unacceptable.60Therefore, we have designed this version of the GPL to prohibit the61practice for those products. If such problems arise substantially in62other domains, we stand ready to extend this provision to those63domains in future versions of the GPL, as needed to protect the64freedom of users.6566Finally, every program is threatened constantly by software patents.67States should not allow patents to restrict development and use of68software on general-purpose computers, but in those that do, we wish69to avoid the special danger that patents applied to a free program70could make it effectively proprietary. To prevent this, the GPL71assures that patents cannot be used to render the program non-free.7273The precise terms and conditions for copying, distribution and74modification follow.7576### TERMS AND CONDITIONS7778#### 0. Definitions.7980"This License" refers to version 3 of the GNU General Public License.8182"Copyright" also means copyright-like laws that apply to other kinds83of works, such as semiconductor masks.8485"The Program" refers to any copyrightable work licensed under this86License. Each licensee is addressed as "you". "Licensees" and87"recipients" may be individuals or organizations.8889To "modify" a work means to copy from or adapt all or part of the work90in a fashion requiring copyright permission, other than the making of91an exact copy. The resulting work is called a "modified version" of92the earlier work or a work "based on" the earlier work.9394A "covered work" means either the unmodified Program or a work based95on the Program.9697To "propagate" a work means to do anything with it that, without98permission, would make you directly or secondarily liable for99infringement under applicable copyright law, except executing it on a100computer or modifying a private copy. Propagation includes copying,101distribution (with or without modification), making available to the102public, and in some countries other activities as well.103104To "convey" a work means any kind of propagation that enables other105parties to make or receive copies. Mere interaction with a user106through a computer network, with no transfer of a copy, is not107conveying.108109An interactive user interface displays "Appropriate Legal Notices" to110the extent that it includes a convenient and prominently visible111feature that (1) displays an appropriate copyright notice, and (2)112tells the user that there is no warranty for the work (except to the113extent that warranties are provided), that licensees may convey the114work under this License, and how to view a copy of this License. If115the interface presents a list of user commands or options, such as a116menu, a prominent item in the list meets this criterion.117118#### 1. Source Code.119120The "source code" for a work means the preferred form of the work for121making modifications to it. "Object code" means any non-source form of122a work.123124A "Standard Interface" means an interface that either is an official125standard defined by a recognized standards body, or, in the case of126interfaces specified for a particular programming language, one that127is widely used among developers working in that language.128129The "System Libraries" of an executable work include anything, other130than the work as a whole, that (a) is included in the normal form of131packaging a Major Component, but which is not part of that Major132Component, and (b) serves only to enable use of the work with that133Major Component, or to implement a Standard Interface for which an134implementation is available to the public in source code form. A135"Major Component", in this context, means a major essential component136(kernel, window system, and so on) of the specific operating system137(if any) on which the executable work runs, or a compiler used to138produce the work, or an object code interpreter used to run it.139140The "Corresponding Source" for a work in object code form means all141the source code needed to generate, install, and (for an executable142work) run the object code and to modify the work, including scripts to143control those activities. However, it does not include the work's144System Libraries, or general-purpose tools or generally available free145programs which are used unmodified in performing those activities but146which are not part of the work. For example, Corresponding Source147includes interface definition files associated with source files for148the work, and the source code for shared libraries and dynamically149linked subprograms that the work is specifically designed to require,150such as by intimate data communication or control flow between those151subprograms and other parts of the work.152153The Corresponding Source need not include anything that users can154regenerate automatically from other parts of the Corresponding Source.155156The Corresponding Source for a work in source code form is that same157work.158159#### 2. Basic Permissions.160161All rights granted under this License are granted for the term of162copyright on the Program, and are irrevocable provided the stated163conditions are met. This License explicitly affirms your unlimited164permission to run the unmodified Program. The output from running a165covered work is covered by this License only if the output, given its166content, constitutes a covered work. This License acknowledges your167rights of fair use or other equivalent, as provided by copyright law.168169You may make, run and propagate covered works that you do not convey,170without conditions so long as your license otherwise remains in force.171You may convey covered works to others for the sole purpose of having172them make modifications exclusively for you, or provide you with173facilities for running those works, provided that you comply with the174terms of this License in conveying all material for which you do not175control copyright. Those thus making or running the covered works for176you must do so exclusively on your behalf, under your direction and177control, on terms that prohibit them from making any copies of your178copyrighted material outside their relationship with you.179180Conveying under any other circumstances is permitted solely under the181conditions stated below. Sublicensing is not allowed; section 10 makes182it unnecessary.183184#### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.185186No covered work shall be deemed part of an effective technological187measure under any applicable law fulfilling obligations under article18811 of the WIPO copyright treaty adopted on 20 December 1996, or189similar laws prohibiting or restricting circumvention of such190measures.191192When you convey a covered work, you waive any legal power to forbid193circumvention of technological measures to the extent such194circumvention is effected by exercising rights under this License with195respect to the covered work, and you disclaim any intention to limit196operation or modification of the work as a means of enforcing, against197the work's users, your or third parties' legal rights to forbid198circumvention of technological measures.199200#### 4. Conveying Verbatim Copies.201202You may convey verbatim copies of the Program's source code as you203receive it, in any medium, provided that you conspicuously and204appropriately publish on each copy an appropriate copyright notice;205keep intact all notices stating that this License and any206non-permissive terms added in accord with section 7 apply to the code;207keep intact all notices of the absence of any warranty; and give all208recipients a copy of this License along with the Program.209210You may charge any price or no price for each copy that you convey,211and you may offer support or warranty protection for a fee.212213#### 5. Conveying Modified Source Versions.214215You may convey a work based on the Program, or the modifications to216produce it from the Program, in the form of source code under the217terms of section 4, provided that you also meet all of these218conditions:219220- a) The work must carry prominent notices stating that you modified221 it, and giving a relevant date.222- b) The work must carry prominent notices stating that it is223 released under this License and any conditions added under224 section 7. This requirement modifies the requirement in section 4225 to "keep intact all notices".226- c) You must license the entire work, as a whole, under this227 License to anyone who comes into possession of a copy. This228 License will therefore apply, along with any applicable section 7229 additional terms, to the whole of the work, and all its parts,230 regardless of how they are packaged. This License gives no231 permission to license the work in any other way, but it does not232 invalidate such permission if you have separately received it.233- d) If the work has interactive user interfaces, each must display234 Appropriate Legal Notices; however, if the Program has interactive235 interfaces that do not display Appropriate Legal Notices, your236 work need not make them do so.237238A compilation of a covered work with other separate and independent239works, which are not by their nature extensions of the covered work,240and which are not combined with it such as to form a larger program,241in or on a volume of a storage or distribution medium, is called an242"aggregate" if the compilation and its resulting copyright are not243used to limit the access or legal rights of the compilation's users244beyond what the individual works permit. Inclusion of a covered work245in an aggregate does not cause this License to apply to the other246parts of the aggregate.247248#### 6. Conveying Non-Source Forms.249250You may convey a covered work in object code form under the terms of251sections 4 and 5, provided that you also convey the machine-readable252Corresponding Source under the terms of this License, in one of these253ways:254255- a) Convey the object code in, or embodied in, a physical product256 (including a physical distribution medium), accompanied by the257 Corresponding Source fixed on a durable physical medium258 customarily used for software interchange.259- b) Convey the object code in, or embodied in, a physical product260 (including a physical distribution medium), accompanied by a261 written offer, valid for at least three years and valid for as262 long as you offer spare parts or customer support for that product263 model, to give anyone who possesses the object code either (1) a264 copy of the Corresponding Source for all the software in the265 product that is covered by this License, on a durable physical266 medium customarily used for software interchange, for a price no267 more than your reasonable cost of physically performing this268 conveying of source, or (2) access to copy the Corresponding269 Source from a network server at no charge.270- c) Convey individual copies of the object code with a copy of the271 written offer to provide the Corresponding Source. This272 alternative is allowed only occasionally and noncommercially, and273 only if you received the object code with such an offer, in accord274 with subsection 6b.275- d) Convey the object code by offering access from a designated276 place (gratis or for a charge), and offer equivalent access to the277 Corresponding Source in the same way through the same place at no278 further charge. You need not require recipients to copy the279 Corresponding Source along with the object code. If the place to280 copy the object code is a network server, the Corresponding Source281 may be on a different server (operated by you or a third party)282 that supports equivalent copying facilities, provided you maintain283 clear directions next to the object code saying where to find the284 Corresponding Source. Regardless of what server hosts the285 Corresponding Source, you remain obligated to ensure that it is286 available for as long as needed to satisfy these requirements.287- e) Convey the object code using peer-to-peer transmission,288 provided you inform other peers where the object code and289 Corresponding Source of the work are being offered to the general290 public at no charge under subsection 6d.291292A separable portion of the object code, whose source code is excluded293from the Corresponding Source as a System Library, need not be294included in conveying the object code work.295296A "User Product" is either (1) a "consumer product", which means any297tangible personal property which is normally used for personal,298family, or household purposes, or (2) anything designed or sold for299incorporation into a dwelling. In determining whether a product is a300consumer product, doubtful cases shall be resolved in favor of301coverage. For a particular product received by a particular user,302"normally used" refers to a typical or common use of that class of303product, regardless of the status of the particular user or of the way304in which the particular user actually uses, or expects or is expected305to use, the product. A product is a consumer product regardless of306whether the product has substantial commercial, industrial or307non-consumer uses, unless such uses represent the only significant308mode of use of the product.309310"Installation Information" for a User Product means any methods,311procedures, authorization keys, or other information required to312install and execute modified versions of a covered work in that User313Product from a modified version of its Corresponding Source. The314information must suffice to ensure that the continued functioning of315the modified object code is in no case prevented or interfered with316solely because modification has been made.317318If you convey an object code work under this section in, or with, or319specifically for use in, a User Product, and the conveying occurs as320part of a transaction in which the right of possession and use of the321User Product is transferred to the recipient in perpetuity or for a322fixed term (regardless of how the transaction is characterized), the323Corresponding Source conveyed under this section must be accompanied324by the Installation Information. But this requirement does not apply325if neither you nor any third party retains the ability to install326modified object code on the User Product (for example, the work has327been installed in ROM).328329The requirement to provide Installation Information does not include a330requirement to continue to provide support service, warranty, or331updates for a work that has been modified or installed by the332recipient, or for the User Product in which it has been modified or333installed. Access to a network may be denied when the modification334itself materially and adversely affects the operation of the network335or violates the rules and protocols for communication across the336network.337338Corresponding Source conveyed, and Installation Information provided,339in accord with this section must be in a format that is publicly340documented (and with an implementation available to the public in341source code form), and must require no special password or key for342unpacking, reading or copying.343344#### 7. Additional Terms.345346"Additional permissions" are terms that supplement the terms of this347License by making exceptions from one or more of its conditions.348Additional permissions that are applicable to the entire Program shall349be treated as though they were included in this License, to the extent350that they are valid under applicable law. If additional permissions351apply only to part of the Program, that part may be used separately352under those permissions, but the entire Program remains governed by353this License without regard to the additional permissions.354355When you convey a copy of a covered work, you may at your option356remove any additional permissions from that copy, or from any part of357it. (Additional permissions may be written to require their own358removal in certain cases when you modify the work.) You may place359additional permissions on material, added by you to a covered work,360for which you have or can give appropriate copyright permission.361362Notwithstanding any other provision of this License, for material you363add to a covered work, you may (if authorized by the copyright holders364of that material) supplement the terms of this License with terms:365366- a) Disclaiming warranty or limiting liability differently from the367 terms of sections 15 and 16 of this License; or368- b) Requiring preservation of specified reasonable legal notices or369 author attributions in that material or in the Appropriate Legal370 Notices displayed by works containing it; or371- c) Prohibiting misrepresentation of the origin of that material,372 or requiring that modified versions of such material be marked in373 reasonable ways as different from the original version; or374- d) Limiting the use for publicity purposes of names of licensors375 or authors of the material; or376- e) Declining to grant rights under trademark law for use of some377 trade names, trademarks, or service marks; or378- f) Requiring indemnification of licensors and authors of that379 material by anyone who conveys the material (or modified versions380 of it) with contractual assumptions of liability to the recipient,381 for any liability that these contractual assumptions directly382 impose on those licensors and authors.383384All other non-permissive additional terms are considered "further385restrictions" within the meaning of section 10. If the Program as you386received it, or any part of it, contains a notice stating that it is387governed by this License along with a term that is a further388restriction, you may remove that term. If a license document contains389a further restriction but permits relicensing or conveying under this390License, you may add to a covered work material governed by the terms391of that license document, provided that the further restriction does392not survive such relicensing or conveying.393394If you add terms to a covered work in accord with this section, you395must place, in the relevant source files, a statement of the396additional terms that apply to those files, or a notice indicating397where to find the applicable terms.398399Additional terms, permissive or non-permissive, may be stated in the400form of a separately written license, or stated as exceptions; the401above requirements apply either way.402403#### 8. Termination.404405You may not propagate or modify a covered work except as expressly406provided under this License. Any attempt otherwise to propagate or407modify it is void, and will automatically terminate your rights under408this License (including any patent licenses granted under the third409paragraph of section 11).410411However, if you cease all violation of this License, then your license412from a particular copyright holder is reinstated (a) provisionally,413unless and until the copyright holder explicitly and finally414terminates your license, and (b) permanently, if the copyright holder415fails to notify you of the violation by some reasonable means prior to41660 days after the cessation.417418Moreover, your license from a particular copyright holder is419reinstated permanently if the copyright holder notifies you of the420violation by some reasonable means, this is the first time you have421received notice of violation of this License (for any work) from that422copyright holder, and you cure the violation prior to 30 days after423your receipt of the notice.424425Termination of your rights under this section does not terminate the426licenses of parties who have received copies or rights from you under427this License. If your rights have been terminated and not permanently428reinstated, you do not qualify to receive new licenses for the same429material under section 10.430431#### 9. Acceptance Not Required for Having Copies.432433You are not required to accept this License in order to receive or run434a copy of the Program. Ancillary propagation of a covered work435occurring solely as a consequence of using peer-to-peer transmission436to receive a copy likewise does not require acceptance. However,437nothing other than this License grants you permission to propagate or438modify any covered work. These actions infringe copyright if you do439not accept this License. Therefore, by modifying or propagating a440covered work, you indicate your acceptance of this License to do so.441442#### 10. Automatic Licensing of Downstream Recipients.443444Each time you convey a covered work, the recipient automatically445receives a license from the original licensors, to run, modify and446propagate that work, subject to this License. You are not responsible447for enforcing compliance by third parties with this License.448449An "entity transaction" is a transaction transferring control of an450organization, or substantially all assets of one, or subdividing an451organization, or merging organizations. If propagation of a covered452work results from an entity transaction, each party to that453transaction who receives a copy of the work also receives whatever454licenses to the work the party's predecessor in interest had or could455give under the previous paragraph, plus a right to possession of the456Corresponding Source of the work from the predecessor in interest, if457the predecessor has it or can get it with reasonable efforts.458459You may not impose any further restrictions on the exercise of the460rights granted or affirmed under this License. For example, you may461not impose a license fee, royalty, or other charge for exercise of462rights granted under this License, and you may not initiate litigation463(including a cross-claim or counterclaim in a lawsuit) alleging that464any patent claim is infringed by making, using, selling, offering for465sale, or importing the Program or any portion of it.466467#### 11. Patents.468469A "contributor" is a copyright holder who authorizes use under this470License of the Program or a work on which the Program is based. The471work thus licensed is called the contributor's "contributor version".472473A contributor's "essential patent claims" are all patent claims owned474or controlled by the contributor, whether already acquired or475hereafter acquired, that would be infringed by some manner, permitted476by this License, of making, using, or selling its contributor version,477but do not include claims that would be infringed only as a478consequence of further modification of the contributor version. For479purposes of this definition, "control" includes the right to grant480patent sublicenses in a manner consistent with the requirements of481this License.482483Each contributor grants you a non-exclusive, worldwide, royalty-free484patent license under the contributor's essential patent claims, to485make, use, sell, offer for sale, import and otherwise run, modify and486propagate the contents of its contributor version.487488In the following three paragraphs, a "patent license" is any express489agreement or commitment, however denominated, not to enforce a patent490(such as an express permission to practice a patent or covenant not to491sue for patent infringement). To "grant" such a patent license to a492party means to make such an agreement or commitment not to enforce a493patent against the party.494495If you convey a covered work, knowingly relying on a patent license,496and the Corresponding Source of the work is not available for anyone497to copy, free of charge and under the terms of this License, through a498publicly available network server or other readily accessible means,499then you must either (1) cause the Corresponding Source to be so500available, or (2) arrange to deprive yourself of the benefit of the501patent license for this particular work, or (3) arrange, in a manner502consistent with the requirements of this License, to extend the patent503license to downstream recipients. "Knowingly relying" means you have504actual knowledge that, but for the patent license, your conveying the505covered work in a country, or your recipient's use of the covered work506in a country, would infringe one or more identifiable patents in that507country that you have reason to believe are valid.508509If, pursuant to or in connection with a single transaction or510arrangement, you convey, or propagate by procuring conveyance of, a511covered work, and grant a patent license to some of the parties512receiving the covered work authorizing them to use, propagate, modify513or convey a specific copy of the covered work, then the patent license514you grant is automatically extended to all recipients of the covered515work and works based on it.516517A patent license is "discriminatory" if it does not include within the518scope of its coverage, prohibits the exercise of, or is conditioned on519the non-exercise of one or more of the rights that are specifically520granted under this License. You may not convey a covered work if you521are a party to an arrangement with a third party that is in the522business of distributing software, under which you make payment to the523third party based on the extent of your activity of conveying the524work, and under which the third party grants, to any of the parties525who would receive the covered work from you, a discriminatory patent526license (a) in connection with copies of the covered work conveyed by527you (or copies made from those copies), or (b) primarily for and in528connection with specific products or compilations that contain the529covered work, unless you entered into that arrangement, or that patent530license was granted, prior to 28 March 2007.531532Nothing in this License shall be construed as excluding or limiting533any implied license or other defenses to infringement that may534otherwise be available to you under applicable patent law.535536#### 12. No Surrender of Others' Freedom.537538If conditions are imposed on you (whether by court order, agreement or539otherwise) that contradict the conditions of this License, they do not540excuse you from the conditions of this License. If you cannot convey a541covered work so as to satisfy simultaneously your obligations under542this License and any other pertinent obligations, then as a543consequence you may not convey it at all. For example, if you agree to544terms that obligate you to collect a royalty for further conveying545from those to whom you convey the Program, the only way you could546satisfy both those terms and this License would be to refrain entirely547from conveying the Program.548549#### 13. Use with the GNU Affero General Public License.550551Notwithstanding any other provision of this License, you have552permission to link or combine any covered work with a work licensed553under version 3 of the GNU Affero General Public License into a single554combined work, and to convey the resulting work. The terms of this555License will continue to apply to the part which is the covered work,556but the special requirements of the GNU Affero General Public License,557section 13, concerning interaction through a network will apply to the558combination as such.559560#### 14. Revised Versions of this License.561562The Free Software Foundation may publish revised and/or new versions563of the GNU General Public License from time to time. Such new versions564will be similar in spirit to the present version, but may differ in565detail to address new problems or concerns.566567Each version is given a distinguishing version number. If the Program568specifies that a certain numbered version of the GNU General Public569License "or any later version" applies to it, you have the option of570following the terms and conditions either of that numbered version or571of any later version published by the Free Software Foundation. If the572Program does not specify a version number of the GNU General Public573License, you may choose any version ever published by the Free574Software Foundation.575576If the Program specifies that a proxy can decide which future versions577of the GNU General Public License can be used, that proxy's public578statement of acceptance of a version permanently authorizes you to579choose that version for the Program.580581Later license versions may give you additional or different582permissions. However, no additional obligations are imposed on any583author or copyright holder as a result of your choosing to follow a584later version.585586#### 15. Disclaimer of Warranty.587588THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY589APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT590HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT591WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT592LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR593A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND594PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE595DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR596CORRECTION.597598#### 16. Limitation of Liability.599600IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING601WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR602CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,603INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES604ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT605NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR606LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM607TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER608PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.609610#### 17. Interpretation of Sections 15 and 16.611612If the disclaimer of warranty and limitation of liability provided613above cannot be given local legal effect according to their terms,614reviewing courts shall apply local law that most closely approximates615an absolute waiver of all civil liability in connection with the616Program, unless a warranty or assumption of liability accompanies a617copy of the Program in return for a fee.618619END OF TERMS AND CONDITIONS620621### How to Apply These Terms to Your New Programs622623If you develop a new program, and you want it to be of the greatest624possible use to the public, the best way to achieve this is to make it625free software which everyone can redistribute and change under these626terms.627628To do so, attach the following notices to the program. It is safest to629attach them to the start of each source file to most effectively state630the exclusion of warranty; and each file should have at least the631"copyright" line and a pointer to where the full notice is found.632633 <one line to give the program's name and a brief idea of what it does.>634 Copyright (C) <year> <name of author>635636 This program is free software: you can redistribute it and/or modify637 it under the terms of the GNU General Public License as published by638 the Free Software Foundation, either version 3 of the License, or639 (at your option) any later version.640641 This program is distributed in the hope that it will be useful,642 but WITHOUT ANY WARRANTY; without even the implied warranty of643 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the644 GNU General Public License for more details.645646 You should have received a copy of the GNU General Public License647 along with this program. If not, see <https://www.gnu.org/licenses/>.648649Also add information on how to contact you by electronic and paper650mail.651652If the program does terminal interaction, make it output a short653notice like this when it starts in an interactive mode:654655 <program> Copyright (C) <year> <name of author>656 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.657 This is free software, and you are welcome to redistribute it658 under certain conditions; type `show c' for details.659660The hypothetical commands \`show w' and \`show c' should show the661appropriate parts of the General Public License. Of course, your662program's commands might be different; for a GUI interface, you would663use an "about box".664665You should also get your employer (if you work as a programmer) or666school, if any, to sign a "copyright disclaimer" for the program, if667necessary. For more information on this, and how to apply and follow668the GNU GPL, see <https://www.gnu.org/licenses/>.669670The GNU General Public License does not permit incorporating your671program into proprietary programs. If your program is a subroutine672library, you may consider it more useful to permit linking proprietary673applications with the library. If this is what you want to do, use the674GNU Lesser General Public License instead of this License. But first,675please read <https://www.gnu.org/licenses/why-not-lgpl.html>.