|  | 
|  | 1 | +		    GNU GENERAL PUBLIC LICENSE | 
|  | 2 | +		       Version 2, June 1991 | 
|  | 3 | + | 
|  | 4 | + Copyright (C) 1989, 1991 Free Software Foundation, Inc., | 
|  | 5 | + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Lesser 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 along | 
|  | 307 | +    with this program; if not, write to the Free Software Foundation, Inc., | 
|  | 308 | +    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | 
|  | 309 | + | 
|  | 310 | +Also add information on how to contact you by electronic and paper mail. | 
|  | 311 | + | 
|  | 312 | +If the program is interactive, make it output a short notice like this | 
|  | 313 | +when it starts in an interactive mode: | 
|  | 314 | + | 
|  | 315 | +    Gnomovision version 69, Copyright (C) year name of author | 
|  | 316 | +    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. | 
|  | 317 | +    This is free software, and you are welcome to redistribute it | 
|  | 318 | +    under certain conditions; type `show c' for details. | 
|  | 319 | + | 
|  | 320 | +The hypothetical commands `show w' and `show c' should show the appropriate | 
|  | 321 | +parts of the General Public License.  Of course, the commands you use may | 
|  | 322 | +be called something other than `show w' and `show c'; they could even be | 
|  | 323 | +mouse-clicks or menu items--whatever suits your program. | 
|  | 324 | + | 
|  | 325 | +You should also get your employer (if you work as a programmer) or your | 
|  | 326 | +school, if any, to sign a "copyright disclaimer" for the program, if | 
|  | 327 | +necessary.  Here is a sample; alter the names: | 
|  | 328 | + | 
|  | 329 | +  Yoyodyne, Inc., hereby disclaims all copyright interest in the program | 
|  | 330 | +  `Gnomovision' (which makes passes at compilers) written by James Hacker. | 
|  | 331 | + | 
|  | 332 | +  <signature of Ty Coon>, 1 April 1989 | 
|  | 333 | +  Ty Coon, President of Vice | 
|  | 334 | + | 
|  | 335 | +This General Public License does not permit incorporating your program into | 
|  | 336 | +proprietary programs.  If your program is a subroutine library, you may | 
|  | 337 | +consider it more useful to permit linking proprietary applications with the | 
|  | 338 | +library.  If this is what you want to do, use the GNU Lesser General | 
|  | 339 | +Public License instead of this License. | 
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