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 |    1                     GNU GENERAL PUBLIC LICENSE | 
 |    2                        Version 2, June 1991 | 
 |    3  | 
 |    4  Copyright (C) 1989, 1991 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 licenses for most software are designed to take away your | 
 |   12 freedom to share and change it.  By contrast, the GNU 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.  This | 
 |   15 General Public License applies to most of the Free Software | 
 |   16 Foundation's software and to any other program whose authors commit to | 
 |   17 using it.  (Some other Free Software Foundation software is covered by | 
 |   18 the GNU Library General Public License instead.)  You can apply it to | 
 |   19 your programs, too. | 
 |   20  | 
 |   21   When we speak of free software, we are referring to freedom, not | 
 |   22 price.  Our General Public Licenses are designed to make sure that you | 
 |   23 have the freedom to distribute copies of free software (and charge for | 
 |   24 this service if you wish), that you receive source code or can get it | 
 |   25 if you want it, that you can change the software or use pieces of it | 
 |   26 in new free programs; and that you know you can do these things. | 
 |   27  | 
 |   28   To protect your rights, we need to make restrictions that forbid | 
 |   29 anyone to deny you these rights or to ask you to surrender the rights. | 
 |   30 These restrictions translate to certain responsibilities for you if you | 
 |   31 distribute copies of the software, or if you modify it. | 
 |   32  | 
 |   33   For example, if you distribute copies of such a program, whether | 
 |   34 gratis or for a fee, you must give the recipients all the rights that | 
 |   35 you have.  You must make sure that they, too, receive or can get the | 
 |   36 source code.  And you must show them these terms so they know their | 
 |   37 rights. | 
 |   38  | 
 |   39   We protect your rights with two steps: (1) copyright the software, and | 
 |   40 (2) offer you this license which gives you legal permission to copy, | 
 |   41 distribute and/or modify the software. | 
 |   42  | 
 |   43   Also, for each author's protection and ours, we want to make certain | 
 |   44 that everyone understands that there is no warranty for this free | 
 |   45 software.  If the software is modified by someone else and passed on, we | 
 |   46 want its recipients to know that what they have is not the original, so | 
 |   47 that any problems introduced by others will not reflect on the original | 
 |   48 authors' reputations. | 
 |   49  | 
 |   50   Finally, any free program is threatened constantly by software | 
 |   51 patents.  We wish to avoid the danger that redistributors of a free | 
 |   52 program will individually obtain patent licenses, in effect making the | 
 |   53 program proprietary.  To prevent this, we have made it clear that any | 
 |   54 patent must be licensed for everyone's free use or not licensed at all. | 
 |   55  | 
 |   56   The precise terms and conditions for copying, distribution and | 
 |   57 modification follow. | 
 |   58  | 
 |   59                     GNU GENERAL PUBLIC LICENSE | 
 |   60    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | 
 |   61  | 
 |   62   0. This License applies to any program or other work which contains | 
 |   63 a notice placed by the copyright holder saying it may be distributed | 
 |   64 under the terms of this General Public License.  The "Program", below, | 
 |   65 refers to any such program or work, and a "work based on the Program" | 
 |   66 means either the Program or any derivative work under copyright law: | 
 |   67 that is to say, a work containing the Program or a portion of it, | 
 |   68 either verbatim or with modifications and/or translated into another | 
 |   69 language.  (Hereinafter, translation is included without limitation in | 
 |   70 the term "modification".)  Each licensee is addressed as "you". | 
 |   71  | 
 |   72 Activities other than copying, distribution and modification are not | 
 |   73 covered by this License; they are outside its scope.  The act of | 
 |   74 running the Program is not restricted, and the output from the Program | 
 |   75 is covered only if its contents constitute a work based on the | 
 |   76 Program (independent of having been made by running the Program). | 
 |   77 Whether that is true depends on what the Program does. | 
 |   78  | 
 |   79   1. You may copy and distribute verbatim copies of the Program's | 
 |   80 source code as you receive it, in any medium, provided that you | 
 |   81 conspicuously and appropriately publish on each copy an appropriate | 
 |   82 copyright notice and disclaimer of warranty; keep intact all the | 
 |   83 notices that refer to this License and to the absence of any warranty; | 
 |   84 and give any other recipients of the Program a copy of this License | 
 |   85 along with the Program. | 
 |   86  | 
 |   87 You may charge a fee for the physical act of transferring a copy, and | 
 |   88 you may at your option offer warranty protection in exchange for a fee. | 
 |   89  | 
 |   90   2. You may modify your copy or copies of the Program or any portion | 
 |   91 of it, thus forming a work based on the Program, and copy and | 
 |   92 distribute such modifications or work under the terms of Section 1 | 
 |   93 above, provided that you also meet all of these conditions: | 
 |   94  | 
 |   95     a) You must cause the modified files to carry prominent notices | 
 |   96     stating that you changed the files and the date of any change. | 
 |   97  | 
 |   98     b) You must cause any work that you distribute or publish, that in | 
 |   99     whole or in part contains or is derived from the Program or any | 
 |  100     part thereof, to be licensed as a whole at no charge to all third | 
 |  101     parties under the terms of this License. | 
 |  102  | 
 |  103     c) If the modified program normally reads commands interactively | 
 |  104     when run, you must cause it, when started running for such | 
 |  105     interactive use in the most ordinary way, to print or display an | 
 |  106     announcement including an appropriate copyright notice and a | 
 |  107     notice that there is no warranty (or else, saying that you provide | 
 |  108     a warranty) and that users may redistribute the program under | 
 |  109     these conditions, and telling the user how to view a copy of this | 
 |  110     License.  (Exception: if the Program itself is interactive but | 
 |  111     does not normally print such an announcement, your work based on | 
 |  112     the Program is not required to print an announcement.) | 
 |  113  | 
 |  114 These requirements apply to the modified work as a whole.  If | 
 |  115 identifiable sections of that work are not derived from the Program, | 
 |  116 and can be reasonably considered independent and separate works in | 
 |  117 themselves, then this License, and its terms, do not apply to those | 
 |  118 sections when you distribute them as separate works.  But when you | 
 |  119 distribute the same sections as part of a whole which is a work based | 
 |  120 on the Program, the distribution of the whole must be on the terms of | 
 |  121 this License, whose permissions for other licensees extend to the | 
 |  122 entire whole, and thus to each and every part regardless of who wrote it. | 
 |  123  | 
 |  124 Thus, it is not the intent of this section to claim rights or contest | 
 |  125 your rights to work written entirely by you; rather, the intent is to | 
 |  126 exercise the right to control the distribution of derivative or | 
 |  127 collective works based on the Program. | 
 |  128  | 
 |  129 In addition, mere aggregation of another work not based on the Program | 
 |  130 with the Program (or with a work based on the Program) on a volume of | 
 |  131 a storage or distribution medium does not bring the other work under | 
 |  132 the scope of this License. | 
 |  133  | 
 |  134   3. You may copy and distribute the Program (or a work based on it, | 
 |  135 under Section 2) in object code or executable form under the terms of | 
 |  136 Sections 1 and 2 above provided that you also do one of the following: | 
 |  137  | 
 |  138     a) Accompany it with the complete corresponding machine-readable | 
 |  139     source code, which must be distributed under the terms of Sections | 
 |  140     1 and 2 above on a medium customarily used for software interchange; or, | 
 |  141  | 
 |  142     b) Accompany it with a written offer, valid for at least three | 
 |  143     years, to give any third party, for a charge no more than your | 
 |  144     cost of physically performing source distribution, a complete | 
 |  145     machine-readable copy of the corresponding source code, to be | 
 |  146     distributed under the terms of Sections 1 and 2 above on a medium | 
 |  147     customarily used for software interchange; or, | 
 |  148  | 
 |  149     c) Accompany it with the information you received as to the offer | 
 |  150     to distribute corresponding source code.  (This alternative is | 
 |  151     allowed only for noncommercial distribution and only if you | 
 |  152     received the program in object code or executable form with such | 
 |  153     an offer, in accord with Subsection b above.) | 
 |  154  | 
 |  155 The source code for a work means the preferred form of the work for | 
 |  156 making modifications to it.  For an executable work, complete source | 
 |  157 code means all the source code for all modules it contains, plus any | 
 |  158 associated interface definition files, plus the scripts used to | 
 |  159 control compilation and installation of the executable.  However, as a | 
 |  160 special exception, the source code distributed need not include | 
 |  161 anything that is normally distributed (in either source or binary | 
 |  162 form) with the major components (compiler, kernel, and so on) of the | 
 |  163 operating system on which the executable runs, unless that component | 
 |  164 itself accompanies the executable. | 
 |  165  | 
 |  166 If distribution of executable or object code is made by offering | 
 |  167 access to copy from a designated place, then offering equivalent | 
 |  168 access to copy the source code from the same place counts as | 
 |  169 distribution of the source code, even though third parties are not | 
 |  170 compelled to copy the source along with the object code. | 
 |  171  | 
 |  172   4. You may not copy, modify, sublicense, or distribute the Program | 
 |  173 except as expressly provided under this License.  Any attempt | 
 |  174 otherwise to copy, modify, sublicense or distribute the Program is | 
 |  175 void, and will automatically terminate your rights under this License. | 
 |  176 However, parties who have received copies, or rights, from you under | 
 |  177 this License will not have their licenses terminated so long as such | 
 |  178 parties remain in full compliance. | 
 |  179  | 
 |  180   5. You are not required to accept this License, since you have not | 
 |  181 signed it.  However, nothing else grants you permission to modify or | 
 |  182 distribute the Program or its derivative works.  These actions are | 
 |  183 prohibited by law if you do not accept this License.  Therefore, by | 
 |  184 modifying or distributing the Program (or any work based on the | 
 |  185 Program), you indicate your acceptance of this License to do so, and | 
 |  186 all its terms and conditions for copying, distributing or modifying | 
 |  187 the Program or works based on it. | 
 |  188  | 
 |  189   6. Each time you redistribute the Program (or any work based on the | 
 |  190 Program), the recipient automatically receives a license from the | 
 |  191 original licensor to copy, distribute or modify the Program subject to | 
 |  192 these terms and conditions.  You may not impose any further | 
 |  193 restrictions on the recipients' exercise of the rights granted herein. | 
 |  194 You are not responsible for enforcing compliance by third parties to | 
 |  195 this License. | 
 |  196  | 
 |  197   7. If, as a consequence of a court judgment or allegation of patent | 
 |  198 infringement or for any other reason (not limited to patent issues), | 
 |  199 conditions are imposed on you (whether by court order, agreement or | 
 |  200 otherwise) that contradict the conditions of this License, they do not | 
 |  201 excuse you from the conditions of this License.  If you cannot | 
 |  202 distribute so as to satisfy simultaneously your obligations under this | 
 |  203 License and any other pertinent obligations, then as a consequence you | 
 |  204 may not distribute the Program at all.  For example, if a patent | 
 |  205 license would not permit royalty-free redistribution of the Program by | 
 |  206 all those who receive copies directly or indirectly through you, then | 
 |  207 the only way you could satisfy both it and this License would be to | 
 |  208 refrain entirely from distribution of the Program. | 
 |  209  | 
 |  210 If any portion of this section is held invalid or unenforceable under | 
 |  211 any particular circumstance, the balance of the section is intended to | 
 |  212 apply and the section as a whole is intended to apply in other | 
 |  213 circumstances. | 
 |  214  | 
 |  215 It is not the purpose of this section to induce you to infringe any | 
 |  216 patents or other property right claims or to contest validity of any | 
 |  217 such claims; this section has the sole purpose of protecting the | 
 |  218 integrity of the free software distribution system, which is | 
 |  219 implemented by public license practices.  Many people have made | 
 |  220 generous contributions to the wide range of software distributed | 
 |  221 through that system in reliance on consistent application of that | 
 |  222 system; it is up to the author/donor to decide if he or she is willing | 
 |  223 to distribute software through any other system and a licensee cannot | 
 |  224 impose that choice. | 
 |  225  | 
 |  226 This section is intended to make thoroughly clear what is believed to | 
 |  227 be a consequence of the rest of this License. | 
 |  228  | 
 |  229   8. If the distribution and/or use of the Program is restricted in | 
 |  230 certain countries either by patents or by copyrighted interfaces, the | 
 |  231 original copyright holder who places the Program under this License | 
 |  232 may add an explicit geographical distribution limitation excluding | 
 |  233 those countries, so that distribution is permitted only in or among | 
 |  234 countries not thus excluded.  In such case, this License incorporates | 
 |  235 the limitation as if written in the body of this License. | 
 |  236  | 
 |  237   9. The Free Software Foundation may publish revised and/or new versions | 
 |  238 of the General Public License from time to time.  Such new versions will | 
 |  239 be similar in spirit to the present version, but may differ in detail to | 
 |  240 address new problems or concerns. | 
 |  241  | 
 |  242 Each version is given a distinguishing version number.  If the Program | 
 |  243 specifies a version number of this License which applies to it and "any | 
 |  244 later version", you have the option of following the terms and conditions | 
 |  245 either of that version or of any later version published by the Free | 
 |  246 Software Foundation.  If the Program does not specify a version number of | 
 |  247 this License, you may choose any version ever published by the Free Software | 
 |  248 Foundation. | 
 |  249  | 
 |  250   10. If you wish to incorporate parts of the Program into other free | 
 |  251 programs whose distribution conditions are different, write to the author | 
 |  252 to ask for permission.  For software which is copyrighted by the Free | 
 |  253 Software Foundation, write to the Free Software Foundation; we sometimes | 
 |  254 make exceptions for this.  Our decision will be guided by the two goals | 
 |  255 of preserving the free status of all derivatives of our free software and | 
 |  256 of promoting the sharing and reuse of software generally. | 
 |  257  | 
 |  258                             NO WARRANTY | 
 |  259  | 
 |  260   11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY | 
 |  261 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN | 
 |  262 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES | 
 |  263 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED | 
 |  264 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | 
 |  265 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS | 
 |  266 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE | 
 |  267 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, | 
 |  268 REPAIR OR CORRECTION. | 
 |  269  | 
 |  270   12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING | 
 |  271 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR | 
 |  272 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, | 
 |  273 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING | 
 |  274 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED | 
 |  275 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY | 
 |  276 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER | 
 |  277 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE | 
 |  278 POSSIBILITY OF SUCH DAMAGES. | 
 |  279  | 
 |  280                      END OF TERMS AND CONDITIONS | 
 |  281  | 
 |  282             How to Apply These Terms to Your New Programs | 
 |  283  | 
 |  284   If you develop a new program, and you want it to be of the greatest | 
 |  285 possible use to the public, the best way to achieve this is to make it | 
 |  286 free software which everyone can redistribute and change under these terms. | 
 |  287  | 
 |  288   To do so, attach the following notices to the program.  It is safest | 
 |  289 to attach them to the start of each source file to most effectively | 
 |  290 convey the exclusion of warranty; and each file should have at least | 
 |  291 the "copyright" line and a pointer to where the full notice is found. | 
 |  292  | 
 |  293     <one line to give the program's name and a brief idea of what it does.> | 
 |  294     Copyright (C) <year>  <name of author> | 
 |  295  | 
 |  296     This program is free software; you can redistribute it and/or modify | 
 |  297     it under the terms of the GNU General Public License as published by | 
 |  298     the Free Software Foundation; either version 2 of the License, or | 
 |  299     (at your option) any later version. | 
 |  300  | 
 |  301     This program is distributed in the hope that it will be useful, | 
 |  302     but WITHOUT ANY WARRANTY; without even the implied warranty of | 
 |  303     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the | 
 |  304     GNU General Public License for more details. | 
 |  305  | 
 |  306     You should have received a copy of the GNU General Public License | 
 |  307     along with this program; if not, write to the Free Software | 
 |  308     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA | 
 |  309  | 
 |  310  | 
 |  311 Also add information on how to contact you by electronic and paper mail. | 
 |  312  | 
 |  313 If the program is interactive, make it output a short notice like this | 
 |  314 when it starts in an interactive mode: | 
 |  315  | 
 |  316     Gnomovision version 69, Copyright (C) year name of author | 
 |  317     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. | 
 |  318     This is free software, and you are welcome to redistribute it | 
 |  319     under certain conditions; type `show c' for details. | 
 |  320  | 
 |  321 The hypothetical commands `show w' and `show c' should show the appropriate | 
 |  322 parts of the General Public License.  Of course, the commands you use may | 
 |  323 be called something other than `show w' and `show c'; they could even be | 
 |  324 mouse-clicks or menu items--whatever suits your program. | 
 |  325  | 
 |  326 You should also get your employer (if you work as a programmer) or your | 
 |  327 school, if any, to sign a "copyright disclaimer" for the program, if | 
 |  328 necessary.  Here is a sample; alter the names: | 
 |  329  | 
 |  330   Yoyodyne, Inc., hereby disclaims all copyright interest in the program | 
 |  331   `Gnomovision' (which makes passes at compilers) written by James Hacker. | 
 |  332  | 
 |  333   <signature of Ty Coon>, 1 April 1989 | 
 |  334   Ty Coon, President of Vice | 
 |  335  | 
 |  336 This General Public License does not permit incorporating your program into | 
 |  337 proprietary programs.  If your program is a subroutine library, you may | 
 |  338 consider it more useful to permit linking proprietary applications with the | 
 |  339 library.  If this is what you want to do, use the GNU Library General | 
 |  340 Public License instead of this License. | 
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