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<h1>GNU General Public License</h1>

<p>Version 2, June 1991</p>
<pre>
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.
</pre>

<h2>Preamble</h2>

<p>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&#39;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.</p>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p>Also, for each author&#39;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&#39; reputations.</p>

<p>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&#39;s free use or not licensed at
all.</p>

<p>The precise terms and conditions for copying, distribution
and modification follow.</p>

<h2>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
MODIFICATION</h2>

<p><strong>0.</strong> 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 &quot;Program&quot;, below,
refers to any such program or work, and a &quot;work based on
the Program&quot; 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 &quot;modification&quot;.) Each licensee is
addressed as &quot;you&quot;.</p>

<p>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.</p>

<p><strong>1.</strong> You may copy and distribute verbatim
copies of the Program&#39;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.</p>

<p>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.</p>

<p><strong>2.</strong> 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:</p>

<ul>
<li><strong>a)</strong> You must cause the modified files
to carry prominent notices stating that you changed the
files and the date of any change.</li>

<li><strong>b)</strong> 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.</li>

<li><strong>c)</strong> 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.)</li>
</ul>

<p>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.</p>

<p>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.</p>

<p>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.</p>

<p><strong>3.</strong> 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:
</p>

<ul>
<li><strong>a)</strong> 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,</li>

<li><strong>b)</strong> 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,</li>

<li><strong>c)</strong> 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.)</li>
</ul>

<p>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.</p>

<p>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.</p>

<p><strong>4.</strong> 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.</p>

<p><strong>5.</strong> 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.</p>

<p><strong>6.</strong> 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&#39; exercise of the rights
granted herein. You are not responsible for enforcing
compliance by third parties to this License.</p>

<p><strong>7.</strong> 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.</p>

<p>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.</p>

<p>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.</p>

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

<p><strong>8.</strong> 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.</p>

<p><strong>9.</strong> 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.</p>

<p>Each version is given a distinguishing version number. If
the Program specifies a version number of this License which
applies to it and &quot;any later version&quot;, 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.</p>

<p><strong>10.</strong> 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.</p>

<p><strong>NO WARRANTY</strong></p>

<p><strong>11.</strong> 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 &quot;AS IS&quot; 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.</p>

<p><strong>12.</strong> 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.</p>

<h2>END OF TERMS AND CONDITIONS</h2>

<h2>How to Apply These Terms to Your New Programs</h2>

<p>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.</p>

<p>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.</p>

<pre>
    &lt;one line to give the program's name and a brief idea of what it does.&gt;
    Copyright (C) &lt;year&gt;  &lt;name of author&gt;

    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
</pre>


<p>Also add information on how to contact you by electronic and paper mail.</p>

<p>If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:</p>
<pre>
    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.
</pre>

<p>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.</p>

<p>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:</p>
<pre>
  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
  `Gnomovision' (which makes passes at compilers) written by James Hacker.

  &lt;signature of Ty Coon&gt;, 1 April 1989
  Ty Coon, President of Vice
</pre>

<p>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.</p>

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