GNU GENERAL PUBLIC LICENSE Ver. 2

    *  GNU GENERAL PUBLIC LICENSE
    *
          o Preamble
          o TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND 
            MODIFICATION
          o How to Apply These Terms to Your New Programs

GNU GENERAL PUBLIC LICENSE

Version 2, June 1991

Copyright (C) 1989, 1991 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 Lesser 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 receive 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.

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 convey 
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 an idea of what it does.
Copyright (C) yyyy  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 2
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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
MA  02110-1301, USA.

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:

Gnomovision version 69, Copyright (C) year name of author
Gnomovision 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, the commands
you use may be called something other than 'show w' and 'show c'; they 
could even be mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your 
school, if any, to sign a "copyright disclaimer" for the program, if 
necessary. Here is a sample; alter the names:

Yoyodyne, Inc., hereby disclaims all copyright
interest in the program 'Gnomovision'
(which makes passes at compilers) written 
by James Hacker.

signature of Ty Coon, 1 April 1989
Ty Coon, President of Vice

This 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.

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