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0001                         
0002                     GNU GENERAL PUBLIC LICENSE
0003                        Version 2, June 1991
0004 
0005  Copyright (C) 1989, 1991 Free Software Foundation, Inc.
0006                59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
0007  Everyone is permitted to copy and distribute verbatim copies
0008  of this license document, but changing it is not allowed.
0009 
0010                             Preamble
0011 
0012   The licenses for most software are designed to take away your
0013 freedom to share and change it.  By contrast, the GNU General Public
0014 License is intended to guarantee your freedom to share and change free
0015 software--to make sure the software is free for all its users.  This
0016 General Public License applies to most of the Free Software
0017 Foundation's software and to any other program whose authors commit to
0018 using it.  (Some other Free Software Foundation software is covered by
0019 the GNU Library General Public License instead.)  You can apply it to
0020 your programs, too.
0021 
0022   When we speak of free software, we are referring to freedom, not
0023 price.  Our General Public Licenses are designed to make sure that you
0024 have the freedom to distribute copies of free software (and charge for
0025 this service if you wish), that you receive source code or can get it
0026 if you want it, that you can change the software or use pieces of it
0027 in new free programs; and that you know you can do these things.
0028 
0029   To protect your rights, we need to make restrictions that forbid
0030 anyone to deny you these rights or to ask you to surrender the rights.
0031 These restrictions translate to certain responsibilities for you if you
0032 distribute copies of the software, or if you modify it.
0033 
0034   For example, if you distribute copies of such a program, whether
0035 gratis or for a fee, you must give the recipients all the rights that
0036 you have.  You must make sure that they, too, receive or can get the
0037 source code.  And you must show them these terms so they know their
0038 rights.
0039 
0040   We protect your rights with two steps: (1) copyright the software, and
0041 (2) offer you this license which gives you legal permission to copy,
0042 distribute and/or modify the software.
0043 
0044   Also, for each author's protection and ours, we want to make certain
0045 that everyone understands that there is no warranty for this free
0046 software.  If the software is modified by someone else and passed on, we
0047 want its recipients to know that what they have is not the original, so
0048 that any problems introduced by others will not reflect on the original
0049 authors' reputations.
0050 
0051   Finally, any free program is threatened constantly by software
0052 patents.  We wish to avoid the danger that redistributors of a free
0053 program will individually obtain patent licenses, in effect making the
0054 program proprietary.  To prevent this, we have made it clear that any
0055 patent must be licensed for everyone's free use or not licensed at all.
0056 
0057   The precise terms and conditions for copying, distribution and
0058 modification follow.
0059 
0060                     GNU GENERAL PUBLIC LICENSE
0061    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0062 
0063   0. This License applies to any program or other work which contains
0064 a notice placed by the copyright holder saying it may be distributed
0065 under the terms of this General Public License.  The "Program", below,
0066 refers to any such program or work, and a "work based on the Program"
0067 means either the Program or any derivative work under copyright law:
0068 that is to say, a work containing the Program or a portion of it,
0069 either verbatim or with modifications and/or translated into another
0070 language.  (Hereinafter, translation is included without limitation in
0071 the term "modification".)  Each licensee is addressed as "you".
0072 
0073 Activities other than copying, distribution and modification are not
0074 covered by this License; they are outside its scope.  The act of
0075 running the Program is not restricted, and the output from the Program
0076 is covered only if its contents constitute a work based on the
0077 Program (independent of having been made by running the Program).
0078 Whether that is true depends on what the Program does.
0079 
0080   1. You may copy and distribute verbatim copies of the Program's
0081 source code as you receive it, in any medium, provided that you
0082 conspicuously and appropriately publish on each copy an appropriate
0083 copyright notice and disclaimer of warranty; keep intact all the
0084 notices that refer to this License and to the absence of any warranty;
0085 and give any other recipients of the Program a copy of this License
0086 along with the Program.
0087 
0088 You may charge a fee for the physical act of transferring a copy, and
0089 you may at your option offer warranty protection in exchange for a fee.
0090 
0091   2. You may modify your copy or copies of the Program or any portion
0092 of it, thus forming a work based on the Program, and copy and
0093 distribute such modifications or work under the terms of Section 1
0094 above, provided that you also meet all of these conditions:
0095 
0096     a) You must cause the modified files to carry prominent notices
0097     stating that you changed the files and the date of any change.
0098 
0099     b) You must cause any work that you distribute or publish, that in
0100     whole or in part contains or is derived from the Program or any
0101     part thereof, to be licensed as a whole at no charge to all third
0102     parties under the terms of this License.
0103 
0104     c) If the modified program normally reads commands interactively
0105     when run, you must cause it, when started running for such
0106     interactive use in the most ordinary way, to print or display an
0107     announcement including an appropriate copyright notice and a
0108     notice that there is no warranty (or else, saying that you provide
0109     a warranty) and that users may redistribute the program under
0110     these conditions, and telling the user how to view a copy of this
0111     License.  (Exception: if the Program itself is interactive but
0112     does not normally print such an announcement, your work based on
0113     the Program is not required to print an announcement.)
0114 
0115 These requirements apply to the modified work as a whole.  If
0116 identifiable sections of that work are not derived from the Program,
0117 and can be reasonably considered independent and separate works in
0118 themselves, then this License, and its terms, do not apply to those
0119 sections when you distribute them as separate works.  But when you
0120 distribute the same sections as part of a whole which is a work based
0121 on the Program, the distribution of the whole must be on the terms of
0122 this License, whose permissions for other licensees extend to the
0123 entire whole, and thus to each and every part regardless of who wrote it.
0124 
0125 Thus, it is not the intent of this section to claim rights or contest
0126 your rights to work written entirely by you; rather, the intent is to
0127 exercise the right to control the distribution of derivative or
0128 collective works based on the Program.
0129 
0130 In addition, mere aggregation of another work not based on the Program
0131 with the Program (or with a work based on the Program) on a volume of
0132 a storage or distribution medium does not bring the other work under
0133 the scope of this License.
0134 
0135   3. You may copy and distribute the Program (or a work based on it,
0136 under Section 2) in object code or executable form under the terms of
0137 Sections 1 and 2 above provided that you also do one of the following:
0138 
0139     a) Accompany it with the complete corresponding machine-readable
0140     source code, which must be distributed under the terms of Sections
0141     1 and 2 above on a medium customarily used for software interchange; or,
0142 
0143     b) Accompany it with a written offer, valid for at least three
0144     years, to give any third party, for a charge no more than your
0145     cost of physically performing source distribution, a complete
0146     machine-readable copy of the corresponding source code, to be
0147     distributed under the terms of Sections 1 and 2 above on a medium
0148     customarily used for software interchange; or,
0149 
0150     c) Accompany it with the information you received as to the offer
0151     to distribute corresponding source code.  (This alternative is
0152     allowed only for noncommercial distribution and only if you
0153     received the program in object code or executable form with such
0154     an offer, in accord with Subsection b above.)
0155 
0156 The source code for a work means the preferred form of the work for
0157 making modifications to it.  For an executable work, complete source
0158 code means all the source code for all modules it contains, plus any
0159 associated interface definition files, plus the scripts used to
0160 control compilation and installation of the executable.  However, as a
0161 special exception, the source code distributed need not include
0162 anything that is normally distributed (in either source or binary
0163 form) with the major components (compiler, kernel, and so on) of the
0164 operating system on which the executable runs, unless that component
0165 itself accompanies the executable.
0166 
0167 If distribution of executable or object code is made by offering
0168 access to copy from a designated place, then offering equivalent
0169 access to copy the source code from the same place counts as
0170 distribution of the source code, even though third parties are not
0171 compelled to copy the source along with the object code.
0172 
0173   4. You may not copy, modify, sublicense, or distribute the Program
0174 except as expressly provided under this License.  Any attempt
0175 otherwise to copy, modify, sublicense or distribute the Program is
0176 void, and will automatically terminate your rights under this License.
0177 However, parties who have received copies, or rights, from you under
0178 this License will not have their licenses terminated so long as such
0179 parties remain in full compliance.
0180 
0181   5. You are not required to accept this License, since you have not
0182 signed it.  However, nothing else grants you permission to modify or
0183 distribute the Program or its derivative works.  These actions are
0184 prohibited by law if you do not accept this License.  Therefore, by
0185 modifying or distributing the Program (or any work based on the
0186 Program), you indicate your acceptance of this License to do so, and
0187 all its terms and conditions for copying, distributing or modifying
0188 the Program or works based on it.
0189 
0190   6. Each time you redistribute the Program (or any work based on the
0191 Program), the recipient automatically receives a license from the
0192 original licensor to copy, distribute or modify the Program subject to
0193 these terms and conditions.  You may not impose any further
0194 restrictions on the recipients' exercise of the rights granted herein.
0195 You are not responsible for enforcing compliance by third parties to
0196 this License.
0197 
0198   7. If, as a consequence of a court judgment or allegation of patent
0199 infringement or for any other reason (not limited to patent issues),
0200 conditions are imposed on you (whether by court order, agreement or
0201 otherwise) that contradict the conditions of this License, they do not
0202 excuse you from the conditions of this License.  If you cannot
0203 distribute so as to satisfy simultaneously your obligations under this
0204 License and any other pertinent obligations, then as a consequence you
0205 may not distribute the Program at all.  For example, if a patent
0206 license would not permit royalty-free redistribution of the Program by
0207 all those who receive copies directly or indirectly through you, then
0208 the only way you could satisfy both it and this License would be to
0209 refrain entirely from distribution of the Program.
0210 
0211 If any portion of this section is held invalid or unenforceable under
0212 any particular circumstance, the balance of the section is intended to
0213 apply and the section as a whole is intended to apply in other
0214 circumstances.
0215 
0216 It is not the purpose of this section to induce you to infringe any
0217 patents or other property right claims or to contest validity of any
0218 such claims; this section has the sole purpose of protecting the
0219 integrity of the free software distribution system, which is
0220 implemented by public license practices.  Many people have made
0221 generous contributions to the wide range of software distributed
0222 through that system in reliance on consistent application of that
0223 system; it is up to the author/donor to decide if he or she is willing
0224 to distribute software through any other system and a licensee cannot
0225 impose that choice.
0226 
0227 This section is intended to make thoroughly clear what is believed to
0228 be a consequence of the rest of this License.
0229 
0230   8. If the distribution and/or use of the Program is restricted in
0231 certain countries either by patents or by copyrighted interfaces, the
0232 original copyright holder who places the Program under this License
0233 may add an explicit geographical distribution limitation excluding
0234 those countries, so that distribution is permitted only in or among
0235 countries not thus excluded.  In such case, this License incorporates
0236 the limitation as if written in the body of this License.
0237 
0238   9. The Free Software Foundation may publish revised and/or new versions
0239 of the General Public License from time to time.  Such new versions will
0240 be similar in spirit to the present version, but may differ in detail to
0241 address new problems or concerns.
0242 
0243 Each version is given a distinguishing version number.  If the Program
0244 specifies a version number of this License which applies to it and "any
0245 later version", you have the option of following the terms and conditions
0246 either of that version or of any later version published by the Free
0247 Software Foundation.  If the Program does not specify a version number of
0248 this License, you may choose any version ever published by the Free Software
0249 Foundation.
0250 
0251   10. If you wish to incorporate parts of the Program into other free
0252 programs whose distribution conditions are different, write to the author
0253 to ask for permission.  For software which is copyrighted by the Free
0254 Software Foundation, write to the Free Software Foundation; we sometimes
0255 make exceptions for this.  Our decision will be guided by the two goals
0256 of preserving the free status of all derivatives of our free software and
0257 of promoting the sharing and reuse of software generally.
0258 
0259                             NO WARRANTY
0260 
0261   11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
0262 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
0263 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
0264 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
0265 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
0266 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
0267 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
0268 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
0269 REPAIR OR CORRECTION.
0270 
0271   12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
0272 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
0273 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
0274 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
0275 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
0276 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
0277 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
0278 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
0279 POSSIBILITY OF SUCH DAMAGES.
0280 
0281                      END OF TERMS AND CONDITIONS
0282 
0283             How to Apply These Terms to Your New Programs
0284 
0285   If you develop a new program, and you want it to be of the greatest
0286 possible use to the public, the best way to achieve this is to make it
0287 free software which everyone can redistribute and change under these terms.
0288 
0289   To do so, attach the following notices to the program.  It is safest
0290 to attach them to the start of each source file to most effectively
0291 convey the exclusion of warranty; and each file should have at least
0292 the "copyright" line and a pointer to where the full notice is found.
0293 
0294     <one line to give the program's name and a brief idea of what it does.>
0295     Copyright (C) 19yy  <name of author>
0296 
0297     This program is free software; you can redistribute it and/or modify
0298     it under the terms of the GNU General Public License as published by
0299     the Free Software Foundation; either version 2 of the License, or
0300     (at your option) any later version.
0301 
0302     This program is distributed in the hope that it will be useful,
0303     but WITHOUT ANY WARRANTY; without even the implied warranty of
0304     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0305     GNU General Public License for more details.
0306 
0307     You should have received a copy of the GNU General Public License
0308     along with this program; if not, write to the Free Software
0309     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
0310 
0311 
0312 Also add information on how to contact you by electronic and paper mail.
0313 
0314 If the program is interactive, make it output a short notice like this
0315 when it starts in an interactive mode:
0316 
0317     Gnomovision version 69, Copyright (C) 19yy name of author
0318     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
0319     This is free software, and you are welcome to redistribute it
0320     under certain conditions; type `show c' for details.
0321 
0322 The hypothetical commands `show w' and `show c' should show the appropriate
0323 parts of the General Public License.  Of course, the commands you use may
0324 be called something other than `show w' and `show c'; they could even be
0325 mouse-clicks or menu items--whatever suits your program.
0326 
0327 You should also get your employer (if you work as a programmer) or your
0328 school, if any, to sign a "copyright disclaimer" for the program, if
0329 necessary.  Here is a sample; alter the names:
0330 
0331   Yoyodyne, Inc., hereby disclaims all copyright interest in the program
0332   `Gnomovision' (which makes passes at compilers) written by James Hacker.
0333 
0334   <signature of Ty Coon>, 1 April 1989
0335   Ty Coon, President of Vice
0336 
0337 This General Public License does not permit incorporating your program into
0338 proprietary programs.  If your program is a subroutine library, you may
0339 consider it more useful to permit linking proprietary applications with the
0340 library.  If this is what you want to do, use the GNU Library General
0341 Public License instead of this License.