GNU GENERAL PUBLIC LICENSE
                   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.

                 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
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) 19yy  <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., 59 Temple Place, Suite 330, Boston,
MA  02111-1307  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) 19yy name of author

    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
type `show w'. This is free software, and you are welcome 
toredistribute 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.