GNU GENERAL PUBLIC LICENSE                             Version 2, June 1991Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave,Cambridge, MA 02139, USA. Everyone is permitted to copy and distribute verbatimcopies of this license document, but changing it is not allowed.                                   PreambleThe licenses for most software are designed to take away your freedom to shareand change it. By contrast, the GNU General Public License is intended toguarantee your freedom to share and change free software--to make sure thesoftware is free for all its users. This General Public License applies to mostof the Free Software Foundation's software and to any other program whoseauthors commit to using it. (Some other Free Software Foundation software iscovered by the GNU Library General Public License instead.) You can apply it toyour programs, too.When we speak of free software, we are referring to freedom, not price. OurGeneral Public Licenses are designed to make sure that you have the freedom todistribute 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 changethe software or use pieces of it in new free programs; and that you know youcan do these things.To protect your rights, we need to make restrictions that forbid anyone to denyyou these rights or to ask you to surrender the rights. These restrictionstranslate to certain responsibilities for you if you distribute copies of thesoftware, or if you modify it.For example, if you distribute copies of such a program, whether gratis or fora fee, you must give the recipients all the rights that you have. You must makesure that they, too, receive or can get the source code. And you must show themthese 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, distributeand/or modify the software.Also, for each author's protection and ours, we want to make certain thateveryone understands that there is no warranty for this free software. If thesoftware is modified by someone else and passed on, we want its recipients toknow that what they have is not the original, so that any problems introducedby others will not reflect on the original authors' reputations.Finally, any free program is threatened constantly by software patents. We wishto avoid the danger that redistributors of a free program will individuallyobtain patent licenses, in effect making the program proprietary. To preventthis, we have made it clear that any patent must be licensed for everyone'sfree use or not licensed at all.The precise terms and conditions for copying, distribution and modificationfollow.                         GNU GENERAL PUBLIC LICENSE      TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION0. This License applies to any program or other work which contains a noticeplaced by the copyright holder saying it may be distributed under the terms ofthis General Public License. The "Program", below, refers to any such programor work, and a "work based on the Program" means either the Program or anyderivative work under copyright law: that is to say, a work containing theProgram or a portion of it, either verbatim or with modifications and/ortranslated into another language. (Hereinafter, translation is included withoutlimitation in the term "modification".) Each licensee is addressed as "you".Activities other than copying, distribution and modification are not covered bythis License; they are outside its scope. The act of running the Program is notrestricted, and the output from the Program is covered only if its contentsconstitute a work based on the Program (independent of having been made byrunning 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 asyou receive it, in any medium, provided that you conspicuously andappropriately publish on each copy an appropriate copyright notice anddisclaimer of warranty; keep intact all the notices that refer to this Licenseand to the absence of any warranty; and give any other recipients of theProgram a copy of this License along with the Program.You may charge a fee for the physical act of transferring a copy, and you mayat 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, thusforming a work based on the Program, and copy and distribute such modificationsor work under the terms of Section 1 above, provided that you also meet all ofthese conditions:a) You must cause the modified files to carry prominent notices stating thatyou changed the files and the date of any change.b) You must cause any work that you distribute or publish, that in whole or inpart contains or is derived from the Program or any part thereof, to belicensed as a whole at no charge to all third parties under the terms of thisLicense.c) If the modified program normally reads commands interactively when run, youmust cause it, when started running for such interactive use in the mostordinary way, to print or display an announcement including an appropriatecopyright notice and a notice that there is no warranty (or else, saying thatyou provide a warranty) and that users may redistribute the program under theseconditions, and telling the user how to view a copy of this License.(Exception: if the Program itself is interactive but does not normally printsuch an announcement, your work based on the Program is not required to printan announcement.)These requirements apply to the modified work as a whole. If identifiablesections of that work are not derived from the Program, and can be reasonablyconsidered independent and separate works in themselves, then this License, andits terms, do not apply to those sections when you distribute them as separateworks. But when you distribute the same sections as part of a whole which is awork based on the Program, the distribution of the whole must be on the termsof this License, whose permissions for other licensees extend to the entirewhole, 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 yourrights to work written entirely by you; rather, the intent is to exercise theright to control the distribution of derivative or collective works based onthe Program.In addition, mere aggregation of another work not based on the Program with theProgram (or with a work based on the Program) on a volume of a storage ordistribution medium does not bring the other work under the scope of thisLicense.3. You may copy and distribute the Program (or a work based on it, underSection 2) in object code or executable form under the terms of Sections 1 and2 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 mediumcustomarily used for software interchange; or,b) Accompany it with a written offer, valid for at least three years, to giveany third party, for a charge no more than your cost of physically performingsource distribution, a complete machine-readable copy of the correspondingsource code, to be distributed under the terms of Sections 1 and 2 above on amedium customarily used for software interchange; or,c) Accompany it with the information you received as to the offer to distributecorresponding source code. (This alternative is allowed only for noncommercialdistribution and only if you received the program in object code or executableform with such an offer, in accord with Subsection b above.)The source code for a work means the preferred form of the work for makingmodifications to it. For an executable work, complete source code means all thesource code for all modules it contains, plus any associated interfacedefinition files, plus the scripts used to control compilation and installationof the executable. However, as a special exception, the source code distributedneed not include anything that is normally distributed (in either source orbinary form) with the major components (compiler, kernel, and so on) of theoperating system on which the executable runs, unless that component itselfaccompanies the executable.If distribution of executable or object code is made by offering access to copyfrom a designated place, then offering equivalent access to copy the sourcecode from the same place counts as distribution of the source code, even thoughthird 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 asexpressly provided under this License. Any attempt otherwise to copy, modify,sublicense or distribute the Program is void, and will automatically terminateyour rights under this License. However, parties who have received copies, orrights, from you under this License will not have their licenses terminated solong 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 Programor its derivative works. These actions are prohibited by law if you do notaccept this License. Therefore, by modifying or distributing the Program (orany work based on the Program), you indicate your acceptance of this License todo so, and all its terms and conditions for copying, distributing or modifyingthe 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 tocopy, distribute or modify the Program subject to these terms and conditions.You may not impose any further restrictions on the recipients' exercise of therights granted herein. You are not responsible for enforcing compliance bythird parties to this License.7. If, as a consequence of a court judgment or allegation of patentinfringement or for any other reason (not limited to patent issues), conditionsare imposed on you (whether by court order, agreement or otherwise) thatcontradict the conditions of this License, they do not excuse you from theconditions of this License. If you cannot distribute so as to satisfysimultaneously your obligations under this License and any other pertinentobligations, then as a consequence you may not distribute the Program at all.For example, if a patent license would not permit royalty-free redistributionof the Program by all those who receive copies directly or indirectly throughyou, then the only way you could satisfy both it and this License would be torefrain entirely from distribution of the Program.If any portion of this section is held invalid or unenforceable under anyparticular circumstance, the balance of the section is intended to apply andthe 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 orother property right claims or to contest validity of any such claims; thissection has the sole purpose of protecting the integrity of the free softwaredistribution system, which is implemented by public license practices. Manypeople have made generous contributions to the wide range of softwaredistributed through that system in reliance on consistent application of thatsystem; it is up to the author/donor to decide if he or she is willing todistribute software through any other system and a licensee cannot impose thatchoice.This section is intended to make thoroughly clear what is believed to be aconsequence of the rest of this License.8. If the distribution and/or use of the Program is restricted in certaincountries either by patents or by copyrighted interfaces, the originalcopyright holder who places the Program under this License may add an explicitgeographical distribution limitation excluding those countries, so thatdistribution is permitted only in or among countries not thus excluded. In suchcase, this License incorporates the limitation as if written in the body ofthis License.9. The Free Software Foundation may publish revised and/or new versions of theGeneral Public License from time to time. Such new versions will be similar inspirit to the present version, but may differ in detail to address new problemsor concerns.Each version is given a distinguishing version number. If the Program specifiesa 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 thatversion or of any later version published by the Free Software Foundation. Ifthe Program does not specify a version number of this License, you may chooseany version ever published by the Free Software Foundation.10. If you wish to incorporate parts of the Program into other free programswhose distribution conditions are different, write to the author to ask forpermission. 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 ofall derivatives of our free software and of promoting the sharing and reuse ofsoftware generally.                                 NO WARRANTY11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FORTHE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISESTATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THEPROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY ANDFITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY ANDPERFORMANCE 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 WILLANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTETHE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANYGENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USEOR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA ORDATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES ORA FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCHHOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.                        END OF TERMS AND CONDITIONS