The GNU General Public License (GPL)

      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

      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