13816.2 GNU General Public LicenseVersion 2, June 1991Copyright (C) 1989, 1991 Free Software Foundation, Inc.51 Franklin St, Fifth Floor, Boston, MA02110-1301USAEveryone is permitted to copy and distribute verbatim copies of this licensedocument, 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 most of theFree Software Foundation's software and to any other program whose authorscommit to using it.(Some other Free Software Foundation software is covered bythe GNU Library General Public License instead.)You can apply it to yourprograms, 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 youreceive source code or can get it if you want it, that you can change the softwareor use pieces of it in new free programs; and that you know you can do thesethings.To protect your rights, we need to make restrictions that forbid anyone to deny youthese rights or to ask you to surrender the rights. These restrictions translate tocertain responsibilities for you if you distribute copies of the software, or if youmodify 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 thatthey, too, receive or can get the source code.And you must show them these termsso they know their rights.We protect your rights with two steps: (1) copyright the software, and (2) offer youthis license which gives you legal permission to copy, distribute and/or modify thesoftware.Also, for each author's protection and ours, we want to make certain that everyoneunderstands that there is no warranty for this free software.If the software ismodified by someone else and passed on, we want its recipients to know that what