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    1 		    GNU GENERAL PUBLIC LICENSE
    2 		     Version 1, February 1989
    3 
    4  Copyright (C) 1989 Free Software Foundation, Inc.
    5                 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
    6  Everyone is permitted to copy and distribute verbatim copies
    7  of this license document, but changing it is not allowed.
    8 
    9 			    Preamble
   10 
   11   The license agreements of most software companies try to keep users
   12 at the mercy of those companies.  By contrast, our General Public
   13 License is intended to guarantee your freedom to share and change free
   14 software--to make sure the software is free for all its users.  The
   15 General Public License applies to the Free Software Foundation's
   16 software and to any other program whose authors commit to using it.
   17 You can use it for your programs, too.
   18 
   19   When we speak of free software, we are referring to freedom, not
   20 price.  Specifically, the General Public License is designed to make
   21 sure that you have the freedom to give away or sell copies of free
   22 software, that you receive source code or can get it if you want it,
   23 that you can change the software or use pieces of it in new free
   24 programs; and that you know you can do these things.
   25 
   26   To protect your rights, we need to make restrictions that forbid
   27 anyone to deny you these rights or to ask you to surrender the rights.
   28 These restrictions translate to certain responsibilities for you if you
   29 distribute copies of the software, or if you modify it.
   30 
   31   For example, if you distribute copies of a such a program, whether
   32 gratis or for a fee, you must give the recipients all the rights that
   33 you have.  You must make sure that they, too, receive or can get the
   34 source code.  And you must tell them their rights.
   35 
   36   We protect your rights with two steps: (1) copyright the software, and
   37 (2) offer you this license which gives you legal permission to copy,
   38 distribute and/or modify the software.
   39 
   40   Also, for each author's protection and ours, we want to make certain
   41 that everyone understands that there is no warranty for this free
   42 software.  If the software is modified by someone else and passed on, we
   43 want its recipients to know that what they have is not the original, so
   44 that any problems introduced by others will not reflect on the original
   45 authors' reputations.
   46 
   47   The precise terms and conditions for copying, distribution and
   48 modification follow.
   49 
   50 		    GNU GENERAL PUBLIC LICENSE
   51    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
   52 
   53   0. This License Agreement applies to any program or other work which
   54 contains a notice placed by the copyright holder saying it may be
   55 distributed under the terms of this General Public License.  The
   56 "Program", below, refers to any such program or work, and a "work based
   57 on the Program" means either the Program or any work containing the
   58 Program or a portion of it, either verbatim or with modifications.  Each
   59 licensee is addressed as "you".
   60 
   61   1. You may copy and distribute verbatim copies of the Program's source
   62 code as you receive it, in any medium, provided that you conspicuously and
   63 appropriately publish on each copy an appropriate copyright notice and
   64 disclaimer of warranty; keep intact all the notices that refer to this
   65 General Public License and to the absence of any warranty; and give any
   66 other recipients of the Program a copy of this General Public License
   67 along with the Program.  You may charge a fee for the physical act of
   68 transferring a copy.
   69 
   70   2. You may modify your copy or copies of the Program or any portion of
   71 it, and copy and distribute such modifications under the terms of Paragraph
   72 1 above, provided that you also do the following:
   73 
   74     a) cause the modified files to carry prominent notices stating that
   75     you changed the files and the date of any change; and
   76 
   77     b) cause the whole of any work that you distribute or publish, that
   78     in whole or in part contains the Program or any part thereof, either
   79     with or without modifications, to be licensed at no charge to all
   80     third parties under the terms of this General Public License (except
   81     that you may choose to grant warranty protection to some or all
   82     third parties, at your option).
   83 
   84     c) If the modified program normally reads commands interactively when
   85     run, you must cause it, when started running for such interactive use
   86     in the simplest and most usual way, to print or display an
   87     announcement including an appropriate copyright notice and a notice
   88     that there is no warranty (or else, saying that you provide a
   89     warranty) and that users may redistribute the program under these
   90     conditions, and telling the user how to view a copy of this General
   91     Public License.
   92 
   93     d) You may charge a fee for the physical act of transferring a
   94     copy, and you may at your option offer warranty protection in
   95     exchange for a fee.
   96 
   97 Mere aggregation of another independent work with the Program (or its
   98 derivative) on a volume of a storage or distribution medium does not bring
   99 the other work under the scope of these terms.
  100 
  101   3. You may copy and distribute the Program (or a portion or derivative of
  102 it, under Paragraph 2) in object code or executable form under the terms of
  103 Paragraphs 1 and 2 above provided that you also do one of the following:
  104 
  105     a) accompany it with the complete corresponding machine-readable
  106     source code, which must be distributed under the terms of
  107     Paragraphs 1 and 2 above; or,
  108 
  109     b) accompany it with a written offer, valid for at least three
  110     years, to give any third party free (except for a nominal charge
  111     for the cost of distribution) a complete machine-readable copy of the
  112     corresponding source code, to be distributed under the terms of
  113     Paragraphs 1 and 2 above; or,
  114 
  115     c) accompany it with the information you received as to where the
  116     corresponding source code may be obtained.  (This alternative is
  117     allowed only for noncommercial distribution and only if you
  118     received the program in object code or executable form alone.)
  119 
  120 Source code for a work means the preferred form of the work for making
  121 modifications to it.  For an executable file, complete source code means
  122 all the source code for all modules it contains; but, as a special
  123 exception, it need not include source code for modules which are standard
  124 libraries that accompany the operating system on which the executable
  125 file runs, or for standard header files or definitions files that
  126 accompany that operating system.
  127 
  128   4. You may not copy, modify, sublicense, distribute or transfer the
  129 Program except as expressly provided under this General Public License.
  130 Any attempt otherwise to copy, modify, sublicense, distribute or transfer
  131 the Program is void, and will automatically terminate your rights to use
  132 the Program under this License.  However, parties who have received
  133 copies, or rights to use copies, from you under this General Public
  134 License will not have their licenses terminated so long as such parties
  135 remain in full compliance.
  136 
  137   5. By copying, distributing or modifying the Program (or any work based
  138 on the Program) you indicate your acceptance of this license to do so,
  139 and all its terms and conditions.
  140 
  141   6. Each time you redistribute the Program (or any work based on the
  142 Program), the recipient automatically receives a license from the original
  143 licensor to copy, distribute or modify the Program subject to these
  144 terms and conditions.  You may not impose any further restrictions on the
  145 recipients' exercise of the rights granted herein.
  146 
  147   7. The Free Software Foundation may publish revised and/or new versions
  148 of the General Public License from time to time.  Such new versions will
  149 be similar in spirit to the present version, but may differ in detail to
  150 address new problems or concerns.
  151 
  152 Each version is given a distinguishing version number.  If the Program
  153 specifies a version number of the license which applies to it and "any
  154 later version", you have the option of following the terms and conditions
  155 either of that version or of any later version published by the Free
  156 Software Foundation.  If the Program does not specify a version number of
  157 the license, you may choose any version ever published by the Free Software
  158 Foundation.
  159 
  160   8. If you wish to incorporate parts of the Program into other free
  161 programs whose distribution conditions are different, write to the author
  162 to ask for permission.  For software which is copyrighted by the Free
  163 Software Foundation, write to the Free Software Foundation; we sometimes
  164 make exceptions for this.  Our decision will be guided by the two goals
  165 of preserving the free status of all derivatives of our free software and
  166 of promoting the sharing and reuse of software generally.
  167 
  168 			    NO WARRANTY
  169 
  170   9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
  171 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
  172 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
  173 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
  174 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  175 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
  176 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
  177 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
  178 REPAIR OR CORRECTION.
  179 
  180   10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
  181 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
  182 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
  183 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
  184 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
  185 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
  186 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
  187 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
  188 POSSIBILITY OF SUCH DAMAGES.
  189 
  190 		     END OF TERMS AND CONDITIONS
  191 
  192 	Appendix: How to Apply These Terms to Your New Programs
  193 
  194   If you develop a new program, and you want it to be of the greatest
  195 possible use to humanity, the best way to achieve this is to make it
  196 free software which everyone can redistribute and change under these
  197 terms.
  198 
  199   To do so, attach the following notices to the program.  It is safest to
  200 attach them to the start of each source file to most effectively convey
  201 the exclusion of warranty; and each file should have at least the
  202 "copyright" line and a pointer to where the full notice is found.
  203 
  204     <one line to give the program's name and a brief idea of what it does.>
  205     Copyright (C) 19yy  <name of author>
  206 
  207     This program is free software; you can redistribute it and/or modify
  208     it under the terms of the GNU General Public License as published by
  209     the Free Software Foundation; either version 1, or (at your option)
  210     any later version.
  211 
  212     This program is distributed in the hope that it will be useful,
  213     but WITHOUT ANY WARRANTY; without even the implied warranty of
  214     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  215     GNU General Public License for more details.
  216 
  217     You should have received a copy of the GNU General Public License
  218     along with this program; if not, write to the Free Software Foundation,
  219     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  220 
  221 Also add information on how to contact you by electronic and paper mail.
  222 
  223 If the program is interactive, make it output a short notice like this
  224 when it starts in an interactive mode:
  225 
  226     Gnomovision version 69, Copyright (C) 19xx name of author
  227     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
  228     This is free software, and you are welcome to redistribute it
  229     under certain conditions; type `show c' for details.
  230 
  231 The hypothetical commands `show w' and `show c' should show the
  232 appropriate parts of the General Public License.  Of course, the
  233 commands you use may be called something other than `show w' and `show
  234 c'; they could even be mouse-clicks or menu items--whatever suits your
  235 program.
  236 
  237 You should also get your employer (if you work as a programmer) or your
  238 school, if any, to sign a "copyright disclaimer" for the program, if
  239 necessary.  Here a sample; alter the names:
  240 
  241   Yoyodyne, Inc., hereby disclaims all copyright interest in the
  242   program `Gnomovision' (a program to direct compilers to make passes
  243   at assemblers) written by James Hacker.
  244 
  245   <signature of Ty Coon>, 1 April 1989
  246   Ty Coon, President of Vice
  247 
  248 That's all there is to it!