GNU General Public License

Version 2, June 1991

Copyright © 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

  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

  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.
  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