
      The GNU General Public License (GPL)
      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 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

      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


