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# GNU General Public License

                             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.

                             GNU GENERAL PUBLIC LICENSE

           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

         How to Apply These Terms to Your New Programs

         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.

         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.

         <one line to give the program's name and a brief idea of what it
         does.>

         Copyright (C) <year> <name of author>

         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

         Also add information on how to contact you by electronic and paper
         mail.

         If the program is interactive, make it output a short notice like
         this when it starts in an interactive mode:

         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.

         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.

         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:

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

         <signature of Ty Coon>, 1 April 1989 Ty Coon, President of Vice

         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.

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