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      1 
      2 		    GNU GENERAL PUBLIC LICENSE
      3 		     Version 1, February 1989
      4 
      5  Copyright (C) 1989 Free Software Foundation, Inc.
      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 
     51 		    GNU GENERAL PUBLIC LICENSE
     52    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
     53 
     54   0. This License Agreement applies to any program or other work which
     55 contains a notice placed by the copyright holder saying it may be
     56 distributed under the terms of this General Public License.  The
     57 "Program", below, refers to any such program or work, and a "work based
     58 on the Program" means either the Program or any work containing the
     59 Program or a portion of it, either verbatim or with modifications.  Each
     60 licensee is addressed as "you".
     61 
     62   1. You may copy and distribute verbatim copies of the Program's source
     63 code as you receive it, in any medium, provided that you conspicuously and
     64 appropriately publish on each copy an appropriate copyright notice and
     65 disclaimer of warranty; keep intact all the notices that refer to this
     66 General Public License and to the absence of any warranty; and give any
     67 other recipients of the Program a copy of this General Public License
     68 along with the Program.  You may charge a fee for the physical act of
     69 transferring a copy.
     70 
     71   2. You may modify your copy or copies of the Program or any portion of
     72 it, and copy and distribute such modifications under the terms of Paragraph
     73 1 above, provided that you also do the following:
     74 
     75     a) cause the modified files to carry prominent notices stating that
     76     you changed the files and the date of any change; and
     77 
     78     b) cause the whole of any work that you distribute or publish, that
     79     in whole or in part contains the Program or any part thereof, either
     80     with or without modifications, to be licensed at no charge to all
     81     third parties under the terms of this General Public License (except
     82     that you may choose to grant warranty protection to some or all
     83     third parties, at your option).
     84 
     85     c) If the modified program normally reads commands interactively when
     86     run, you must cause it, when started running for such interactive use
     87     in the simplest and most usual way, to print or display an
     88     announcement including an appropriate copyright notice and a notice
     89     that there is no warranty (or else, saying that you provide a
     90     warranty) and that users may redistribute the program under these
     91     conditions, and telling the user how to view a copy of this General
     92     Public License.
     93 
     94     d) You may charge a fee for the physical act of transferring a
     95     copy, and you may at your option offer warranty protection in
     96     exchange for a fee.
     97 
     98 Mere aggregation of another independent work with the Program (or its
     99 derivative) on a volume of a storage or distribution medium does not bring
    100 the other work under the scope of these terms.
    101 
    103   3. You may copy and distribute the Program (or a portion or derivative of
    104 it, under Paragraph 2) in object code or executable form under the terms of
    105 Paragraphs 1 and 2 above provided that you also do one of the following:
    106 
    107     a) accompany it with the complete corresponding machine-readable
    108     source code, which must be distributed under the terms of
    109     Paragraphs 1 and 2 above; or,
    110 
    111     b) accompany it with a written offer, valid for at least three
    112     years, to give any third party free (except for a nominal charge
    113     for the cost of distribution) a complete machine-readable copy of the
    114     corresponding source code, to be distributed under the terms of
    115     Paragraphs 1 and 2 above; or,
    116 
    117     c) accompany it with the information you received as to where the
    118     corresponding source code may be obtained.  (This alternative is
    119     allowed only for noncommercial distribution and only if you
    120     received the program in object code or executable form alone.)
    121 
    122 Source code for a work means the preferred form of the work for making
    123 modifications to it.  For an executable file, complete source code means
    124 all the source code for all modules it contains; but, as a special
    125 exception, it need not include source code for modules which are standard
    126 libraries that accompany the operating system on which the executable
    127 file runs, or for standard header files or definitions files that
    128 accompany that operating system.
    129 
    130   4. You may not copy, modify, sublicense, distribute or transfer the
    131 Program except as expressly provided under this General Public License.
    132 Any attempt otherwise to copy, modify, sublicense, distribute or transfer
    133 the Program is void, and will automatically terminate your rights to use
    134 the Program under this License.  However, parties who have received
    135 copies, or rights to use copies, from you under this General Public
    136 License will not have their licenses terminated so long as such parties
    137 remain in full compliance.
    138 
    139   5. By copying, distributing or modifying the Program (or any work based
    140 on the Program) you indicate your acceptance of this license to do so,
    141 and all its terms and conditions.
    142 
    143   6. Each time you redistribute the Program (or any work based on the
    144 Program), the recipient automatically receives a license from the original
    145 licensor to copy, distribute or modify the Program subject to these
    146 terms and conditions.  You may not impose any further restrictions on the
    147 recipients' exercise of the rights granted herein.
    148 
    150   7. The Free Software Foundation may publish revised and/or new versions
    151 of the General Public License from time to time.  Such new versions will
    152 be similar in spirit to the present version, but may differ in detail to
    153 address new problems or concerns.
    154 
    155 Each version is given a distinguishing version number.  If the Program
    156 specifies a version number of the license which applies to it and "any
    157 later version", you have the option of following the terms and conditions
    158 either of that version or of any later version published by the Free
    159 Software Foundation.  If the Program does not specify a version number of
    160 the license, you may choose any version ever published by the Free Software
    161 Foundation.
    162 
    163   8. If you wish to incorporate parts of the Program into other free
    164 programs whose distribution conditions are different, write to the author
    165 to ask for permission.  For software which is copyrighted by the Free
    166 Software Foundation, write to the Free Software Foundation; we sometimes
    167 make exceptions for this.  Our decision will be guided by the two goals
    168 of preserving the free status of all derivatives of our free software and
    169 of promoting the sharing and reuse of software generally.
    170 
    171 			    NO WARRANTY
    172 
    173   9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
    174 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
    175 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
    176 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
    177 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    178 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
    179 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
    180 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
    181 REPAIR OR CORRECTION.
    182 
    183   10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
    184 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
    185 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
    186 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
    187 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
    188 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
    189 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
    190 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
    191 POSSIBILITY OF SUCH DAMAGES.
    192 
    193 		     END OF TERMS AND CONDITIONS
    194 
    196 	Appendix: How to Apply These Terms to Your New Programs
    197 
    198   If you develop a new program, and you want it to be of the greatest
    199 possible use to humanity, the best way to achieve this is to make it
    200 free software which everyone can redistribute and change under these
    201 terms.
    202 
    203   To do so, attach the following notices to the program.  It is safest to
    204 attach them to the start of each source file to most effectively convey
    205 the exclusion of warranty; and each file should have at least the
    206 "copyright" line and a pointer to where the full notice is found.
    207 
    208     <one line to give the program's name and a brief idea of what it does.>
    209     Copyright (C) 19yy  <name of author>
    210 
    211     This program is free software; you can redistribute it and/or modify
    212     it under the terms of the GNU General Public License as published by
    213     the Free Software Foundation; either version 1, or (at your option)
    214     any later version.
    215 
    216     This program is distributed in the hope that it will be useful,
    217     but WITHOUT ANY WARRANTY; without even the implied warranty of
    218     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    219     GNU General Public License for more details.
    220 
    221     You should have received a copy of the GNU General Public License
    222     along with this program; if not, write to the Free Software
    223     Foundation, Inc.
    224 
    225 Also add information on how to contact you by electronic and paper mail.
    226 
    227 If the program is interactive, make it output a short notice like this
    228 when it starts in an interactive mode:
    229 
    230     Gnomovision version 69, Copyright (C) 19xx name of author
    231     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    232     This is free software, and you are welcome to redistribute it
    233     under certain conditions; type `show c' for details.
    234 
    235 The hypothetical commands `show w' and `show c' should show the
    236 appropriate parts of the General Public License.  Of course, the
    237 commands you use may be called something other than `show w' and `show
    238 c'; they could even be mouse-clicks or menu items--whatever suits your
    239 program.
    240 
    241 You should also get your employer (if you work as a programmer) or your
    242 school, if any, to sign a "copyright disclaimer" for the program, if
    243 necessary.  Here a sample; alter the names:
    244 
    245   Yoyodyne, Inc., hereby disclaims all copyright interest in the
    246   program `Gnomovision' (a program to direct compilers to make passes
    247   at assemblers) written by James Hacker.
    248 
    249   <signature of Ty Coon>, 1 April 1989
    250   Ty Coon, President of Vice
    251 
    252 That's all there is to it!
    253