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The GNU General Public License (GPL)
Version 2, June 1991

Copyright (C) 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 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 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 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 
modification follow.

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 term "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.

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.

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.

2. You may modify your copy or copies of the Program or any portion of 
it, thus forming a work based on the Program, and copy and distribute 
such modifications or work under the terms of Section 1 above, provided 
that you also meet all of these conditions:

    a) You must cause the modified files to carry prominent notices 
       stating that you changed the files and the date of any change.

    b) You must cause any work that you distribute or publish, that in 
       whole or in part contains or is derived from the Program or any 
       part thereof, to be licensed as a whole at no charge to all third 
       parties under the terms of this License.

    c) If the modified program normally reads commands interactively when 
       run, you must cause it, when started running for such interactive 
       use in the most ordinary way, to print or display an announcement 
       including an appropriate copyright notice and a notice that there 
       is no warranty (or else, saying that you provide a warranty) and 
       that users may redistribute the program under these conditions, 
       and telling the user how to view a copy of this License. (Exception: 
       if the Program itself is interactive but does not normally print 
       such an announcement, your work based on the Program is not 
       required to print an announcement.)

These requirements apply to the modified work as a whole. If identifiable 
sections of that work are not derived from the Program, and can be reasonably 
considered independent and separate works in themselves, then this License, 
and its terms, do not apply to those sections when you distribute them as 
separate works. But when you distribute the same sections as part of a whole
which is a work based on the Program, the distribution of the whole must be 
on the terms of this License, whose permissions for other licensees extend 
to the entire whole, and thus to each and every part regardless of who 
wrote it.

Thus, it is not the intent of this section to claim rights or contest your 
rights to work written entirely by you; rather, the intent is to exercise 
the right to control the distribution of derivative or collective works 
based on the Program.

In addition, mere aggregation of another work not based on the Program with 
the Program (or with a work based on the Program) on a volume of a storage 
or distribution medium does not bring the other work under the scope of 
this License.

3. You may copy and distribute the Program (or a work based on it, under 
Section 2) in object code or executable form under the terms of Sections 
1 and 2 above provided that you also do one of the following:

    a) Accompany it with the complete corresponding machine-readable source 
       code, which must be distributed under the terms of Sections 1 and 2 
       above on a medium customarily used for software interchange; or,

    b) Accompany it with a written offer, valid for at least three years, to 
       give any third party, for a charge no more than your cost of physically 
       performing source distribution, a complete machine-readable copy of 
       the corresponding source code, to be distributed under the terms of 
       Sections 1 and 2 above on a medium customarily used for software 
       interchange; or,

    c) Accompany it with the information you received as to the offer to 
       distribute corresponding source code. (This alternative is allowed 
       only for noncommercial distribution and only if you received the 
       program in object code or executable form with such an offer, in 
       accord with Subsection b above.)

The source code for a work means the preferred form of the work for making 
modifications to it. For an executable work, complete source code means all 
the source code for all modules it contains, plus any associated interface 
definition files, plus the scripts used to control compilation and installation 
of the executable. However, as a special exception, the source code distributed 
need not include anything that is normally distributed (in either source or 
binary form) with the major components (compiler, kernel, and so on) of the 
operating system on which the executable runs, unless that component itself 
accompanies the executable.

If distribution of executable or object code is made by offering access to 
copy from a designated place, then offering equivalent access to copy the 
source code from the same place counts as distribution of the source code, 
even though third parties are not compelled to copy the source along with 
the object code.

4. You may not copy, modify, sublicense, or distribute the Program except 
as expressly provided under this License. Any attempt otherwise to copy, 
modify, sublicense or distribute the Program is void, and will automatically 
terminate your rights under this License. However, parties who have received 
copies, or rights, from you under this License will not have their licenses 
terminated so long as such parties remain in full compliance.

5. You are not required to accept this License, since you have not signed 
it. However, nothing else grants you permission to modify or distribute 
the Program or its derivative works. These actions are prohibited by law 
if you do not accept this License. Therefore, by modifying or distributing 
the Program (or any work based on the Program), you indicate your acceptance 
of this License to do so, and all its terms and conditions for copying, 
distributing or modifying the Program or works based on it.

6. Each time you redistribute the Program (or any work based on the Program), 
the recipient automatically receives a license from the original licensor 
to copy, distribute or modify the Program subject to these terms and conditions. 
You may not impose any further restrictions on the recipients' exercise of 
the rights granted herein. You are not responsible for enforcing compliance 
by third parties to this License.

7. If, as a consequence of a court judgment or allegation of patent infringement 
or for any other reason (not limited to patent issues), conditions are imposed 
on you (whether by court order, agreement or otherwise) that contradict the 
conditions of this License, they do not excuse you from the conditions of this 
License. If you cannot distribute so as to satisfy simultaneously your obligations 
under this License and any other pertinent obligations, then as a consequence 
you may not distribute the Program at all. For example, if a patent license 
would not permit royalty-free redistribution of the Program by all those who 
eceive copies directly or indirectly through you, then the only way you could 
satisfy both it and this License would be to refrain entirely from distribution 
of the Program.

If any portion of this section is held invalid or unenforceable under any particular 
circumstance, the balance of the section is intended to apply and the section as 
a whole is intended to apply in other circumstances.

It is not the purpose of this section to induce you to infringe any patents or 
other property right claims or to contest validity of any such claims; this section 
has the sole purpose of protecting the integrity of the free software distribution 
system, which is implemented by public license practices. Many people have made 
generous contributions to the wide range of software distributed through that 
system in reliance on consistent application of that system; it is up to the 
author/donor to decide if he or she is willing to distribute software through 
any other system and a licensee cannot impose that choice.

This section is intended to make thoroughly clear what is believed to be a 
consequence of the rest of this License.

8. If the distribution and/or use of the Program is restricted in certain 
countries either by patents or by copyrighted interfaces, the original copyright 
holder who places the Program under this License may add an explicit geographical 
distribution limitation excluding those countries, so that distribution is permitted 
only in or among countries not thus excluded. In such case, this License incorporates 
the limitation as if written in the body of this License.

9. The Free Software Foundation may publish revised and/or new versions of the 
General Public License from time to time. Such new versions will be similar in 
spirit to the present version, but may differ in detail to address new problems 
or concerns.

Each version is given a distinguishing version number. If the Program specifies 
a version number of this License which applies to it and "any later version", you 
have the option of following the terms and conditions either of that version or 
of any later version published by the Free Software Foundation. If the Program 
does not specify a version number of this License, you may choose any version ever 
published by the Free Software Foundation.

10. If you wish to incorporate parts of the Program into other free programs 
whose distribution conditions are different, write to the author to ask for 
permission. For software which is copyrighted by the Free Software Foundation, 
write to the Free Software Foundation; we sometimes make exceptions for this. 
Our decision will be guided by the two goals of preserving the free status of 
all derivatives of our free software and of promoting the sharing and reuse of 
software generally.

NO WARRANTY

11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, 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.

12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL 
ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE 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.
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