LICENSE

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 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 pass on to the recipients
the same freedoms that you received. 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 a brief idea of what it does.>
    Copyright (C) <year>  <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 Library General
Public License instead of this License.