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.

TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  1. 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.
  2. 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.
  3. 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:
       1. You must cause the modified files to carry prominent notices
          stating that you changed the files and the date of any change.
       2. 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.
       3. 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.
  4. 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:
       1. 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,
       2. 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,
       3. 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.
  5. 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.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
 10. 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.
 11. 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

 12. 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.
 13. 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
