                    GNU GENERAL PUBLIC LICENSE
                       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.

                    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.)

 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.

 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.,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

