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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright 1989, 1991, 1997 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU
General Public
License is intended to guarantee your freedom to share and change free software--to make sure the software is free for
all its users. This General Public License applies to most of the Free Software Foundation>s software and to any other
program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU
Library General Public License instead.) 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 this service 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 make restrictions that forbid anyone to deny you these rights or to ask you to
surrender the rights.
These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the
rights that you have. 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.
We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal
permission to copy, distribute and/or modify the software.
Also, for each author>s protection and ours, we want to make certain that everyone understands that there is no
warranty for this free
software. If the software is modifi ed by someone else and passed on, we want its recipients to know that what they
have is not the original, so that any problems introduced by others will not refl ect on the original authors> reputations.
Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors
of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we
have made it clear that any patent must be licensed for everyone>s free use or not licensed at all.
The precise terms and conditions for copying, distribution and modifi cation follow.
GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
MODIFICATION
This License applies to any program or other work which contains a notice placed by the copyright holder saying it
may be distributed under the terms of this General Public License. The «Program», below, refers to any such program
or work, and a «work based on the Program» means either the Program or any derivative work under copyright law: that
is to say, a work containing the Program or a portion of it, either verbatim or with modifi cations and/or translated into
another language. (Hereinafter, translation is included without limitation in the term «modifi cation».) Each licensee is
addressed as «you».
Activities other than copying, distribution and modifi cation are not covered by this License; they are outside its scope.
The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute
a work based on the Program (independent of having been made by running the Program). Whether that is true depends
on what the Program does.
1. You may copy and distribute verbatim copies of the Program>s source code as you receive it, in any medium,
provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer
of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other
recipients of the Program a copy of this License along with the Program.
