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0001 GNU GENERAL PUBLIC LICENSE
0002 Version 1, February 1989
0003 
0004 Copyright (C) 1989 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor,
0005 Boston, MA 02110-1301 USA
0006 
0007 Everyone is permitted to copy and distribute verbatim copies of this license
0008 document, but changing it is not allowed.
0009 
0010 Preamble
0011 
0012 The license agreements of most software companies try to keep users at the
0013 mercy of those companies. By contrast, our General Public License is intended
0014 to guarantee your freedom to share and change free software--to make sure
0015 the software is free for all its users. The General Public License applies
0016 to the Free Software Foundation's software and to any other program whose
0017 authors commit to using it. You can use it for your programs, too.
0018 
0019 When we speak of free software, we are referring to freedom, not price. Specifically,
0020 the General Public License is designed to make sure that you have the freedom
0021 to give away or sell copies of free software, that you receive source code
0022 or can get it if you want it, that you can change the software or use pieces
0023 of it in new free programs; and that you know you can do these things.
0024 
0025 To protect your rights, we need to make restrictions that forbid anyone to
0026 deny you these rights or to ask you to surrender the rights. These restrictions
0027 translate to certain responsibilities for you if you distribute copies of
0028 the software, or if you modify it.
0029 
0030 For example, if you distribute copies of a such a program, whether gratis
0031 or for a fee, you must give the recipients all the rights that you have. You
0032 must make sure that they, too, receive or can get the source code. And you
0033 must tell them their rights.
0034 
0035 We protect your rights with two steps: (1) copyright the software, and (2)
0036 offer you this license which gives you legal permission to copy, distribute
0037 and/or modify the software.
0038 
0039 Also, for each author's protection and ours, we want to make certain that
0040 everyone understands that there is no warranty for this free software. If
0041 the software is modified by someone else and passed on, we want its recipients
0042 to know that what they have is not the original, so that any problems introduced
0043 by others will not reflect on the original authors' reputations.
0044 
0045 The precise terms and conditions for copying, distribution and modification
0046 follow.
0047 
0048 GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION
0049 AND MODIFICATION
0050 
0051 0. This License Agreement applies to any program or other work which contains
0052 a notice placed by the copyright holder saying it may be distributed under
0053 the terms of this General Public License. The "Program", below, refers to
0054 any such program or work, and a "work based on the Program" means either the
0055 Program or any work containing the Program or a portion of it, either verbatim
0056 or with modifications. Each licensee is addressed as "you".
0057 
0058 1. You may copy and distribute verbatim copies of the Program's source code
0059 as you receive it, in any medium, provided that you conspicuously and appropriately
0060 publish on each copy an appropriate copyright notice and disclaimer of warranty;
0061 keep intact all the notices that refer to this General Public License and
0062 to the absence of any warranty; and give any other recipients of the Program
0063 a copy of this General Public License along with the Program. You may charge
0064 a fee for the physical act of transferring a copy.
0065 
0066 2. You may modify your copy or copies of the Program or any portion of it,
0067 and copy and distribute such modifications under the terms of Paragraph 1
0068 above, provided that you also do the following:
0069 
0070 a) cause the modified files to carry prominent notices stating that you changed
0071 the files and the date of any change; and
0072 
0073 b) cause the whole of any work that you distribute or publish, that in whole
0074 or in part contains the Program or any part thereof, either with or without
0075 modifications, to be licensed at no charge to all third parties under the
0076 terms of this General Public License (except that you may choose to grant
0077 warranty protection to some or all third parties, at your option).
0078 
0079 c) If the modified program normally reads commands interactively when run,
0080 you must cause it, when started running for such interactive use in the simplest
0081 and most usual way, to print or display an announcement including an appropriate
0082 copyright notice and a notice that there is no warranty (or else, saying that
0083 you provide a warranty) and that users may redistribute the program under
0084 these conditions, and telling the user how to view a copy of this General
0085 Public License.
0086 
0087 d) You may charge a fee for the physical act of transferring a copy, and you
0088 may at your option offer warranty protection in exchange for a fee.
0089 
0090 Mere aggregation of another independent work with the Program (or its derivative)
0091 on a volume of a storage or distribution medium does not bring the other work
0092 under the scope of these terms.
0093 
0094 3. You may copy and distribute the Program (or a portion or derivative of
0095 it, under Paragraph 2) in object code or executable form under the terms of
0096 Paragraphs 1 and 2 above provided that you also do one of the following:
0097 
0098 a) accompany it with the complete corresponding machine-readable source code,
0099 which must be distributed under the terms of Paragraphs 1 and 2 above; or,
0100 
0101 b) accompany it with a written offer, valid for at least three years, to give
0102 any third party free (except for a nominal charge for the cost of distribution)
0103 a complete machine-readable copy of the corresponding source code, to be distributed
0104 under the terms of Paragraphs 1 and 2 above; or,
0105 
0106 c) accompany it with the information you received as to where the corresponding
0107 source code may be obtained. (This alternative is allowed only for noncommercial
0108 distribution and only if you received the program in object code or executable
0109 form alone.)
0110 
0111 Source code for a work means the preferred form of the work for making modifications
0112 to it. For an executable file, complete source code means all the source code
0113 for all modules it contains; but, as a special exception, it need not include
0114 source code for modules which are standard libraries that accompany the operating
0115 system on which the executable file runs, or for standard header files or
0116 definitions files that accompany that operating system.
0117 
0118 4. You may not copy, modify, sublicense, distribute or transfer the Program
0119 except as expressly provided under this General Public License. Any attempt
0120 otherwise to copy, modify, sublicense, distribute or transfer the Program
0121 is void, and will automatically terminate your rights to use the Program under
0122 this License. However, parties who have received copies, or rights to use
0123 copies, from you under this General Public License will not have their licenses
0124 terminated so long as such parties remain in full compliance.
0125 
0126 5. By copying, distributing or modifying the Program (or any work based on
0127 the Program) you indicate your acceptance of this license to do so, and all
0128 its terms and conditions.
0129 
0130 6. Each time you redistribute the Program (or any work based on the Program),
0131 the recipient automatically receives a license from the original licensor
0132 to copy, distribute or modify the Program subject to these terms and conditions.
0133 You may not impose any further restrictions on the recipients' exercise of
0134 the rights granted herein.
0135 
0136 7. The Free Software Foundation may publish revised and/or new versions of
0137 the General Public License from time to time. Such new versions will be similar
0138 in spirit to the present version, but may differ in detail to address new
0139 problems or concerns.
0140 
0141 Each version is given a distinguishing version number. If the Program specifies
0142 a version number of the license which applies to it and "any later version",
0143 you have the option of following the terms and conditions either of that version
0144 or of any later version published by the Free Software Foundation. If the
0145 Program does not specify a version number of the license, you may choose any
0146 version ever published by the Free Software Foundation.
0147 
0148 8. If you wish to incorporate parts of the Program into other free programs
0149 whose distribution conditions are different, write to the author to ask for
0150 permission. For software which is copyrighted by the Free Software Foundation,
0151 write to the Free Software Foundation; we sometimes make exceptions for this.
0152 Our decision will be guided by the two goals of preserving the free status
0153 of all derivatives of our free software and of promoting the sharing and reuse
0154 of software generally.
0155 
0156 NO WARRANTY
0157 
0158 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR
0159 THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE
0160 STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM
0161 "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
0162 BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
0163 FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
0164 OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
0165 THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
0166 
0167 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
0168 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE
0169 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
0170 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
0171 OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA
0172 OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES
0173 OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
0174 HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
0175 
0176 END OF TERMS AND CONDITIONS
0177 
0178 Appendix: How to Apply These Terms to Your New Programs
0179 
0180 If you develop a new program, and you want it to be of the greatest possible
0181 use to humanity, the best way to achieve this is to make it free software
0182 which everyone can redistribute and change under these terms.
0183 
0184 To do so, attach the following notices to the program. It is safest to attach
0185 them to the start of each source file to most effectively convey the exclusion
0186 of warranty; and each file should have at least the "copyright" line and a
0187 pointer to where the full notice is found.
0188 
0189 <one line to give the program's name and a brief idea of what it does.> Copyright
0190 (C) 19yy <name of author>
0191 
0192 This program is free software; you can redistribute it and/or modify it under
0193 the terms of the GNU General Public License as published by the Free Software
0194 Foundation; either version 1, or (at your option) any later version.
0195 
0196 This program is distributed in the hope that it will be useful, but WITHOUT
0197 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
0198 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
0199 
0200 You should have received a copy of the GNU General Public License along with
0201 this program; if not, write to the Free Software Foundation, Inc., 675 Mass
0202 Ave, Cambridge, MA 02139, USA.
0203 
0204 Also add information on how to contact you by electronic and paper mail.
0205 
0206 If the program is interactive, make it output a short notice like this when
0207 it starts in an interactive mode:
0208 
0209 Gnomovision version 69, Copyright (C) 19xx name of author Gnomovision comes
0210 with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
0211 and you are welcome to redistribute it under certain conditions; type `show
0212 c' for details.
0213 
0214 The hypothetical commands `show w' and `show c' should show the appropriate
0215 parts of the General Public License. Of course, the commands you use may be
0216 called something other than `show w' and `show c'; they could even be mouse-clicks
0217 or menu items--whatever suits your program.
0218 
0219 You should also get your employer (if you work as a programmer) or your school,
0220 if any, to sign a "copyright disclaimer" for the program, if necessary. Here
0221 a sample; alter the names:
0222 
0223 Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision'
0224 (a program to direct compilers to make passes at assemblers) written by James
0225 Hacker.
0226 
0227      <signature of Ty Coon>, 1 April 1989 Ty Coon, President of Vice
0228 
0229 That's all there is to it!