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-GNU GENERAL PUBLIC LICENSE
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- Version 2, June 1991
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-
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- Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
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- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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- Everyone is permitted to copy and distribute verbatim copies
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- of this license document, but changing it is not allowed.
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-
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- Preamble
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-
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- The licenses for most software are designed to take away your
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-freedom to share and change it. By contrast, the GNU General Public
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-License is intended to guarantee your freedom to share and change free
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-software--to make sure the software is free for all its users. This
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-General Public License applies to most of the Free Software
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-Foundation's software and to any other program whose authors commit to
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-using it. (Some other Free Software Foundation software is covered by
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-the GNU Lesser General Public License instead.) You can apply it to
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-your programs, too.
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-
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- When we speak of free software, we are referring to freedom, not
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-price. Our General Public Licenses are designed to make sure that you
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-have the freedom to distribute copies of free software (and charge for
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-this service if you wish), that you receive source code or can get it
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-if you want it, that you can change the software or use pieces of it
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-in new free programs; and that you know you can do these things.
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-
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- To protect your rights, we need to make restrictions that forbid
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-anyone to deny you these rights or to ask you to surrender the rights.
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-These restrictions translate to certain responsibilities for you if you
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-distribute copies of the software, or if you modify it.
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-
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- For example, if you distribute copies of such a program, whether
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-gratis or for a fee, you must give the recipients all the rights that
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-you have. You must make sure that they, too, receive or can get the
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-source code. And you must show them these terms so they know their
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-rights.
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-
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- We protect your rights with two steps: (1) copyright the software, and
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-(2) offer you this license which gives you legal permission to copy,
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-distribute and/or modify the software.
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-
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- Also, for each author's protection and ours, we want to make certain
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-that everyone understands that there is no warranty for this free
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-software. If the software is modified by someone else and passed on, we
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-want its recipients to know that what they have is not the original, so
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-that any problems introduced by others will not reflect on the original
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-authors' reputations.
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-
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- Finally, any free program is threatened constantly by software
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-patents. We wish to avoid the danger that redistributors of a free
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-program will individually obtain patent licenses, in effect making the
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-program proprietary. To prevent this, we have made it clear that any
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-patent must be licensed for everyone's free use or not licensed at all.
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-
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- The precise terms and conditions for copying, distribution and
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-modification follow.
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-
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- GNU GENERAL PUBLIC LICENSE
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- TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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-
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- 0. This License applies to any program or other work which contains
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-a notice placed by the copyright holder saying it may be distributed
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-under the terms of this General Public License. The "Program", below,
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-refers to any such program or work, and a "work based on the Program"
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-means either the Program or any derivative work under copyright law:
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-that is to say, a work containing the Program or a portion of it,
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-either verbatim or with modifications and/or translated into another
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-language. (Hereinafter, translation is included without limitation in
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-the term "modification".) Each licensee is addressed as "you".
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-
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-Activities other than copying, distribution and modification are not
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-covered by this License; they are outside its scope. The act of
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-running the Program is not restricted, and the output from the Program
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-is covered only if its contents constitute a work based on the
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-Program (independent of having been made by running the Program).
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-Whether that is true depends on what the Program does.
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-
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- 1. You may copy and distribute verbatim copies of the Program's
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-source code as you receive it, in any medium, provided that you
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-conspicuously and appropriately publish on each copy an appropriate
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-copyright notice and disclaimer of warranty; keep intact all the
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-notices that refer to this License and to the absence of any warranty;
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-and give any other recipients of the Program a copy of this License
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-along with the Program.
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-
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-You may charge a fee for the physical act of transferring a copy, and
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-you may at your option offer warranty protection in exchange for a fee.
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-
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- 2. You may modify your copy or copies of the Program or any portion
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-of it, thus forming a work based on the Program, and copy and
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-distribute such modifications or work under the terms of Section 1
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-above, provided that you also meet all of these conditions:
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-
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- a) You must cause the modified files to carry prominent notices
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- stating that you changed the files and the date of any change.
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-
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- b) You must cause any work that you distribute or publish, that in
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- whole or in part contains or is derived from the Program or any
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- part thereof, to be licensed as a whole at no charge to all third
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- parties under the terms of this License.
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-
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- c) If the modified program normally reads commands interactively
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- when run, you must cause it, when started running for such
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- interactive use in the most ordinary way, to print or display an
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- announcement including an appropriate copyright notice and a
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- notice that there is no warranty (or else, saying that you provide
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- a warranty) and that users may redistribute the program under
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- these conditions, and telling the user how to view a copy of this
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- License. (Exception: if the Program itself is interactive but
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- does not normally print such an announcement, your work based on
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- the Program is not required to print an announcement.)
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-
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-These requirements apply to the modified work as a whole. If
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-identifiable sections of that work are not derived from the Program,
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-and can be reasonably considered independent and separate works in
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-themselves, then this License, and its terms, do not apply to those
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-sections when you distribute them as separate works. But when you
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-distribute the same sections as part of a whole which is a work based
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-on the Program, the distribution of the whole must be on the terms of
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-this License, whose permissions for other licensees extend to the
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-entire whole, and thus to each and every part regardless of who wrote it.
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-
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-Thus, it is not the intent of this section to claim rights or contest
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-your rights to work written entirely by you; rather, the intent is to
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-exercise the right to control the distribution of derivative or
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-collective works based on the Program.
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-
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-In addition, mere aggregation of another work not based on the Program
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-with the Program (or with a work based on the Program) on a volume of
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-a storage or distribution medium does not bring the other work under
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-the scope of this License.
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-
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- 3. You may copy and distribute the Program (or a work based on it,
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-under Section 2) in object code or executable form under the terms of
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-Sections 1 and 2 above provided that you also do one of the following:
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-
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- a) Accompany it with the complete corresponding machine-readable
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- source code, which must be distributed under the terms of Sections
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- 1 and 2 above on a medium customarily used for software interchange; or,
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-
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- b) Accompany it with a written offer, valid for at least three
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- years, to give any third party, for a charge no more than your
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- cost of physically performing source distribution, a complete
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- machine-readable copy of the corresponding source code, to be
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- distributed under the terms of Sections 1 and 2 above on a medium
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- customarily used for software interchange; or,
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-
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- c) Accompany it with the information you received as to the offer
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- to distribute corresponding source code. (This alternative is
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- allowed only for noncommercial distribution and only if you
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- received the program in object code or executable form with such
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- an offer, in accord with Subsection b above.)
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-
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-The source code for a work means the preferred form of the work for
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-making modifications to it. For an executable work, complete source
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-code means all the source code for all modules it contains, plus any
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-associated interface definition files, plus the scripts used to
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-control compilation and installation of the executable. However, as a
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-special exception, the source code distributed need not include
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-anything that is normally distributed (in either source or binary
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-form) with the major components (compiler, kernel, and so on) of the
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-operating system on which the executable runs, unless that component
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-itself accompanies the executable.
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-
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-If distribution of executable or object code is made by offering
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-access to copy from a designated place, then offering equivalent
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-access to copy the source code from the same place counts as
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-distribution of the source code, even though third parties are not
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-compelled to copy the source along with the object code.
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-
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- 4. You may not copy, modify, sublicense, or distribute the Program
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-except as expressly provided under this License. Any attempt
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-otherwise to copy, modify, sublicense or distribute the Program is
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-void, and will automatically terminate your rights under this License.
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-However, parties who have received copies, or rights, from you under
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-this License will not have their licenses terminated so long as such
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-parties remain in full compliance.
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-
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- 5. You are not required to accept this License, since you have not
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-signed it. However, nothing else grants you permission to modify or
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-distribute the Program or its derivative works. These actions are
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-prohibited by law if you do not accept this License. Therefore, by
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-modifying or distributing the Program (or any work based on the
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-Program), you indicate your acceptance of this License to do so, and
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-all its terms and conditions for copying, distributing or modifying
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-the Program or works based on it.
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-
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- 6. Each time you redistribute the Program (or any work based on the
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-Program), the recipient automatically receives a license from the
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-original licensor to copy, distribute or modify the Program subject to
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-these terms and conditions. You may not impose any further
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-restrictions on the recipients' exercise of the rights granted herein.
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-You are not responsible for enforcing compliance by third parties to
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-this License.
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-
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- 7. If, as a consequence of a court judgment or allegation of patent
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-infringement or for any other reason (not limited to patent issues),
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-conditions are imposed on you (whether by court order, agreement or
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-otherwise) that contradict the conditions of this License, they do not
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-excuse you from the conditions of this License. If you cannot
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-distribute so as to satisfy simultaneously your obligations under this
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-License and any other pertinent obligations, then as a consequence you
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-may not distribute the Program at all. For example, if a patent
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-license would not permit royalty-free redistribution of the Program by
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-all those who receive copies directly or indirectly through you, then
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-the only way you could satisfy both it and this License would be to
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-refrain entirely from distribution of the Program.
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-
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-If any portion of this section is held invalid or unenforceable under
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-any particular circumstance, the balance of the section is intended to
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-apply and the section as a whole is intended to apply in other
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-circumstances.
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-
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-It is not the purpose of this section to induce you to infringe any
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-patents or other property right claims or to contest validity of any
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-such claims; this section has the sole purpose of protecting the
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-integrity of the free software distribution system, which is
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-implemented by public license practices. Many people have made
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-generous contributions to the wide range of software distributed
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-through that system in reliance on consistent application of that
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-system; it is up to the author/donor to decide if he or she is willing
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-to distribute software through any other system and a licensee cannot
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-impose that choice.
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-
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-This section is intended to make thoroughly clear what is believed to
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-be a consequence of the rest of this License.
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-
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- 8. If the distribution and/or use of the Program is restricted in
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-certain countries either by patents or by copyrighted interfaces, the
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-original copyright holder who places the Program under this License
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-may add an explicit geographical distribution limitation excluding
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-those countries, so that distribution is permitted only in or among
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-countries not thus excluded. In such case, this License incorporates
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-the limitation as if written in the body of this License.
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-
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- 9. The Free Software Foundation may publish revised and/or new versions
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-of the General Public License from time to time. Such new versions will
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-be similar in spirit to the present version, but may differ in detail to
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-address new problems or concerns.
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-
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-Each version is given a distinguishing version number. If the Program
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-specifies a version number of this License which applies to it and "any
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-later version", you have the option of following the terms and conditions
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-either of that version or of any later version published by the Free
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-Software Foundation. If the Program does not specify a version number of
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-this License, you may choose any version ever published by the Free Software
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-Foundation.
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-
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- 10. If you wish to incorporate parts of the Program into other free
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-programs whose distribution conditions are different, write to the author
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-to ask for permission. For software which is copyrighted by the Free
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-Software Foundation, write to the Free Software Foundation; we sometimes
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-make exceptions for this. Our decision will be guided by the two goals
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-of preserving the free status of all derivatives of our free software and
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-of promoting the sharing and reuse of software generally.
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-
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- NO WARRANTY
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-
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- 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
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-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
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-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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-REPAIR OR CORRECTION.
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-
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- 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
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-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
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-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
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-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
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-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
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-POSSIBILITY OF SUCH DAMAGES.
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-
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- END OF TERMS AND CONDITIONS
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-
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- How to Apply These Terms to Your New Programs
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-
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- If you develop a new program, and you want it to be of the greatest
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-possible use to the public, the best way to achieve this is to make it
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-free software which everyone can redistribute and change under these terms.
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-
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- To do so, attach the following notices to the program. It is safest
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-to attach them to the start of each source file to most effectively
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-convey the exclusion of warranty; and each file should have at least
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-the "copyright" line and a pointer to where the full notice is found.
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-
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- {description}
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- Copyright (C) {year} {fullname}
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-
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- This program is free software; you can redistribute it and/or modify
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- it under the terms of the GNU General Public License as published by
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- the Free Software Foundation; either version 2 of the License, or
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- (at your option) any later version.
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-
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- This program is distributed in the hope that it will be useful,
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
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- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- GNU General Public License for more details.
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-
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- You should have received a copy of the GNU General Public License along
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- with this program; if not, write to the Free Software Foundation, Inc.,
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- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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-
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-Also add information on how to contact you by electronic and paper mail.
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-
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-If the program is interactive, make it output a short notice like this
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-when it starts in an interactive mode:
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-
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- Gnomovision version 69, Copyright (C) year name of author
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- Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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- This is free software, and you are welcome to redistribute it
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- under certain conditions; type `show c' for details.
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-
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-The hypothetical commands `show w' and `show c' should show the appropriate
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-parts of the General Public License. Of course, the commands you use may
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-be called something other than `show w' and `show c'; they could even be
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-mouse-clicks or menu items--whatever suits your program.
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-
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-You should also get your employer (if you work as a programmer) or your
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-school, if any, to sign a "copyright disclaimer" for the program, if
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-necessary. Here is a sample; alter the names:
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-
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- Yoyodyne, Inc., hereby disclaims all copyright interest in the program
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- `Gnomovision' (which makes passes at compilers) written by James Hacker.
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-
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- {signature of Ty Coon}, 1 April 1989
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- Ty Coon, President of Vice
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-
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-This General Public License does not permit incorporating your program into
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-proprietary programs. If your program is a subroutine library, you may
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-consider it more useful to permit linking proprietary applications with the
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-library. If this is what you want to do, use the GNU Lesser General
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-Public License instead of this License.
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huqi