COPYING
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r220 | GNU GENERAL PUBLIC LICENSE | |||
Version 3, 29 June 2007 | ||||
Copyright (C) 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 | ||||
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To "modify" a work means to copy from or adapt all or part of the work | ||||
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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 | ||||
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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 | ||||
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a computer network, with no transfer of a copy, is not conveying. | ||||
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to the extent that it includes a convenient and prominently visible | ||||
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The "source code" for a work means the preferred form of the work | ||||
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The Corresponding Source for a work in source code form is that | ||||
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All rights granted under this License are granted for the term of | ||||
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No covered work shall be deemed part of an effective technological | ||||
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4. Conveying Verbatim Copies. | ||||
You may convey verbatim copies of the Program's source code as you | ||||
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You may charge any price or no price for each copy that you convey, | ||||
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You may convey a work based on the Program, or the modifications to | ||||
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c) You must license the entire work, as a whole, under this | ||||
License to anyone who comes into possession of a copy. This | ||||
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"aggregate" if the compilation and its resulting copyright are not | ||||
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beyond what the individual works permit. Inclusion of a covered work | ||||
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6. 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 | ||||
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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. | ||||
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(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 | ||||
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copy of the Corresponding Source for all the software in the | ||||
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medium customarily used for software interchange, for a price no | ||||
more than your reasonable cost of physically performing this | ||||
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Corresponding Source from a network server at no charge. | ||||
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"Additional permissions" are terms that supplement the terms of this | ||||
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Additional permissions that are applicable to the entire Program shall | ||||
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Notwithstanding any other provision of this License, for material you | ||||
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a) Disclaiming warranty or limiting liability differently from the | ||||
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All other non-permissive additional terms are considered "further | ||||
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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 | ||||
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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) | ||||
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Termination of your rights under this section does not terminate the | ||||
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reinstated, you do not qualify to receive new licenses for the same | ||||
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9. Acceptance Not Required for Having Copies. | ||||
You are not required to accept this License in order to receive or | ||||
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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 | ||||
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10. Automatic Licensing of Downstream Recipients. | ||||
Each time you convey a covered work, the recipient automatically | ||||
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An "entity transaction" is a transaction transferring control of an | ||||
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11. Patents. | ||||
A "contributor" is a copyright holder who authorizes use under this | ||||
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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 | ||||
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but do not include claims that would be infringed only as a | ||||
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If you convey a covered work, knowingly relying on a patent license, | ||||
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If, pursuant to or in connection with a single transaction or | ||||
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A patent license is "discriminatory" if it does not include within | ||||
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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 | ||||
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13. Use with the GNU Affero General Public License. | ||||
Notwithstanding any other provision of this License, you have | ||||
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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 | ||||
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be similar in spirit to the present version, but may differ in detail to | ||||
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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>. | ||||