		    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 Lesser 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.,













    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Lesser General













Public License instead of this License.