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GNU GENERAL PUBLIC LICENSE Version 2, June 1991
Copyright © 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 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 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 the 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 you
have. You must make sure that they too, receive or can get the source code. Also you must show them these terms so they know
their rights.
We protect your right 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 modified 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 reflect 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 license, 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 modification follow.
GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING,
DISTRIBUTION AND MODIFICATION
0. 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 modifications and/or translated into another language.
(Hereinafter, translation is included without limitation in the terms “modification”.) Each licensee is addressed as “you”.
Activities other than copying, distribution and modification 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.
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 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.
You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in
exchange for a fee.
1.
Exhibit A