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	<title>GNU General Public License</title>
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<h1>GNU General Public License</h1>
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<p>Version 2, June 1991</p>
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<pre>
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
27
</pre>
28
 
29
<h2>Preamble</h2>
30
 
31
<p>The licenses for most software are designed to take away
32
your freedom to share and change it. By contrast, the GNU
33
General Public License is intended to guarantee your freedom
34
to share and change free software--to make sure the software
35
is free for all its users. This General Public License
36
applies to most of the Free Software Foundation&#39;s
37
software and to any other program whose authors commit to
38
using it. (Some other Free Software Foundation software is
39
covered by the GNU Library General Public License instead.)
40
You can apply it to your programs, too.</p>
41
 
42
<p>When we speak of free software, we are referring to
43
freedom, not price. Our General Public Licenses are designed
44
to make sure that you have the freedom to distribute copies
45
of free software (and charge for this service if you wish),
46
that you receive source code or can get it if you want it,
47
that you can change the software or use pieces of it in new
48
free programs; and that you know you can do these things.</p>
49
 
50
<p>To protect your rights, we need to make restrictions that
51
forbid anyone to deny you these rights or to ask you to
52
surrender the rights. These restrictions translate to certain
53
responsibilities for you if you distribute copies of the
54
software, or if you modify it.</p>
55
 
56
<p>For example, if you distribute copies of such a program,
57
whether gratis or for a fee, you must give the recipients all
58
the rights that you have. You must make sure that they, too,
59
receive or can get the source code. And you must show them
60
these terms so they know their rights.</p>
61
 
62
<p>We protect your rights with two steps: (1) copyright the
63
software, and (2) offer you this license which gives you
64
legal permission to copy, distribute and/or modify the
65
software.</p>
66
 
67
<p>Also, for each author&#39;s protection and ours, we want
68
to make certain that everyone understands that there is no
69
warranty for this free software. If the software is modified
70
by someone else and passed on, we want its recipients to know
71
that what they have is not the original, so that any problems
72
introduced by others will not reflect on the original
73
authors&#39; reputations.</p>
74
 
75
<p>Finally, any free program is threatened constantly by
76
software patents. We wish to avoid the danger that
77
redistributors of a free program will individually obtain
78
patent licenses, in effect making the program proprietary. To
79
prevent this, we have made it clear that any patent must be
80
licensed for everyone&#39;s free use or not licensed at
81
all.</p>
82
 
83
<p>The precise terms and conditions for copying, distribution
84
and modification follow.</p>
85
 
86
<h2>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
87
MODIFICATION</h2>
88
 
89
<p><strong>0.</strong> This License applies to any program or
90
other work which contains a notice placed by the copyright
91
holder saying it may be distributed under the terms of this
92
General Public License. The &quot;Program&quot;, below,
93
refers to any such program or work, and a &quot;work based on
94
the Program&quot; means either the Program or any derivative
95
work under copyright law: that is to say, a work containing
96
the Program or a portion of it, either verbatim or with
97
modifications and/or translated into another language.
98
(Hereinafter, translation is included without limitation in
99
the term &quot;modification&quot;.) Each licensee is
100
addressed as &quot;you&quot;.</p>
101
 
102
<p>Activities other than copying, distribution and
103
modification are not covered by this License; they are
104
outside its scope. The act of running the Program is not
105
restricted, and the output from the Program is covered only
106
if its contents constitute a work based on the Program
107
(independent of having been made by running the Program).
108
Whether that is true depends on what the Program does.</p>
109
 
110
<p><strong>1.</strong> You may copy and distribute verbatim
111
copies of the Program&#39;s source code as you receive it, in
112
any medium, provided that you conspicuously and appropriately
113
publish on each copy an appropriate copyright notice and
114
disclaimer of warranty; keep intact all the notices that
115
refer to this License and to the absence of any warranty; and
116
give any other recipients of the Program a copy of this
117
License along with the Program.</p>
118
 
119
<p>You may charge a fee for the physical act of transferring
120
a copy, and you may at your option offer warranty protection
121
in exchange for a fee.</p>
122
 
123
<p><strong>2.</strong> You may modify your copy or copies of
124
the Program or any portion of it, thus forming a work based
125
on the Program, and copy and distribute such modifications or
126
work under the terms of Section 1 above, provided that you
127
also meet all of these conditions:</p>
128
 
129
<ul>
130
<li><strong>a)</strong> You must cause the modified files
131
to carry prominent notices stating that you changed the
132
files and the date of any change.</li>
133
 
134
<li><strong>b)</strong> You must cause any work that you
135
distribute or publish, that in whole or in part contains or
136
is derived from the Program or any part thereof, to be
137
licensed as a whole at no charge to all third parties under
138
the terms of this License.</li>
139
 
140
<li><strong>c)</strong> If the modified program normally
141
reads commands interactively when run, you must cause it,
142
when started running for such interactive use in the most
143
ordinary way, to print or display an announcement including
144
an appropriate copyright notice and a notice that there is
145
no warranty (or else, saying that you provide a warranty)
146
and that users may redistribute the program under these
147
conditions, and telling the user how to view a copy of this
148
License. (Exception: if the Program itself is interactive
149
but does not normally print such an announcement, your work
150
based on the Program is not required to print an
151
announcement.)</li>
152
</ul>
153
 
154
<p>These requirements apply to the modified work as a whole.
155
If identifiable sections of that work are not derived from
156
the Program, and can be reasonably considered independent and
157
separate works in themselves, then this License, and its
158
terms, do not apply to those sections when you distribute
159
them as separate works. But when you distribute the same
160
sections as part of a whole which is a work based on the
161
Program, the distribution of the whole must be on the terms
162
of this License, whose permissions for other licensees extend
163
to the entire whole, and thus to each and every part
164
regardless of who wrote it.</p>
165
 
166
<p>Thus, it is not the intent of this section to claim rights
167
or contest your rights to work written entirely by you;
168
rather, the intent is to exercise the right to control the
169
distribution of derivative or collective works based on the
170
Program.</p>
171
 
172
<p>In addition, mere aggregation of another work not based on
173
the Program with the Program (or with a work based on the
174
Program) on a volume of a storage or distribution medium does
175
not bring the other work under the scope of this License.</p>
176
 
177
<p><strong>3.</strong> You may copy and distribute the
178
Program (or a work based on it, under Section 2) in object
179
code or executable form under the terms of Sections 1 and 2
180
above provided that you also do one of the following:
181
</p>
182
 
183
<ul>
184
<li><strong>a)</strong> Accompany it with the complete
185
corresponding machine-readable source code, which must be
186
distributed under the terms of Sections 1 and 2 above on a
187
medium customarily used for software interchange; or,</li>
188
 
189
<li><strong>b)</strong> Accompany it with a written offer,
190
valid for at least three years, to give any third party,
191
for a charge no more than your cost of physically
192
performing source distribution, a complete machine-readable
193
copy of the corresponding source code, to be distributed
194
under the terms of Sections 1 and 2 above on a medium
195
customarily used for software interchange; or,</li>
196
 
197
<li><strong>c)</strong> Accompany it with the information
198
you received as to the offer to distribute corresponding
199
source code. (This alternative is allowed only for
200
noncommercial distribution and only if you received the
201
program in object code or executable form with such an
202
offer, in accord with Subsection b above.)</li>
203
</ul>
204
 
205
<p>The source code for a work means the preferred form of the
206
work for making modifications to it. For an executable work,
207
complete source code means all the source code for all
208
modules it contains, plus any associated interface definition
209
files, plus the scripts used to control compilation and
210
installation of the executable. However, as a special
211
exception, the source code distributed need not include
212
anything that is normally distributed (in either source or
213
binary form) with the major components (compiler, kernel, and
214
so on) of the operating system on which the executable runs,
215
unless that component itself accompanies the executable.</p>
216
 
217
<p>If distribution of executable or object code is made by
218
offering access to copy from a designated place, then
219
offering equivalent access to copy the source code from the
220
same place counts as distribution of the source code, even
221
though third parties are not compelled to copy the source
222
along with the object code.</p>
223
 
224
<p><strong>4.</strong> You may not copy, modify, sublicense,
225
or distribute the Program except as expressly provided under
226
this License. Any attempt otherwise to copy, modify,
227
sublicense or distribute the Program is void, and will
228
automatically terminate your rights under this License.
229
However, parties who have received copies, or rights, from
230
you under this License will not have their licenses
231
terminated so long as such parties remain in full
232
compliance.</p>
233
 
234
<p><strong>5.</strong> You are not required to accept this
235
License, since you have not signed it. However, nothing else
236
grants you permission to modify or distribute the Program or
237
its derivative works. These actions are prohibited by law if
238
you do not accept this License. Therefore, by modifying or
239
distributing the Program (or any work based on the Program),
240
you indicate your acceptance of this License to do so, and
241
all its terms and conditions for copying, distributing or
242
modifying the Program or works based on it.</p>
243
 
244
<p><strong>6.</strong> Each time you redistribute the Program
245
(or any work based on the Program), the recipient
246
automatically receives a license from the original licensor
247
to copy, distribute or modify the Program subject to these
248
terms and conditions. You may not impose any further
249
restrictions on the recipients&#39; exercise of the rights
250
granted herein. You are not responsible for enforcing
251
compliance by third parties to this License.</p>
252
 
253
<p><strong>7.</strong> If, as a consequence of a court
254
judgment or allegation of patent infringement or for any
255
other reason (not limited to patent issues), conditions are
256
imposed on you (whether by court order, agreement or
257
otherwise) that contradict the conditions of this License,
258
they do not excuse you from the conditions of this License.
259
If you cannot distribute so as to satisfy simultaneously your
260
obligations under this License and any other pertinent
261
obligations, then as a consequence you may not distribute the
262
Program at all. For example, if a patent license would not
263
permit royalty-free redistribution of the Program by all
264
those who receive copies directly or indirectly through you,
265
then the only way you could satisfy both it and this License
266
would be to refrain entirely from distribution of the
267
Program.</p>
268
 
269
<p>If any portion of this section is held invalid or
270
unenforceable under any particular circumstance, the balance
271
of the section is intended to apply and the section as a
272
whole is intended to apply in other circumstances.</p>
273
 
274
<p>It is not the purpose of this section to induce you to
275
infringe any patents or other property right claims or to
276
contest validity of any such claims; this section has the
277
sole purpose of protecting the integrity of the free software
278
distribution system, which is implemented by public license
279
practices. Many people have made generous contributions to
280
the wide range of software distributed through that system in
281
reliance on consistent application of that system; it is up
282
to the author/donor to decide if he or she is willing to
283
distribute software through any other system and a licensee
284
cannot impose that choice.</p>
285
 
286
<p>This section is intended to make thoroughly clear what is
287
believed to be a consequence of the rest of this License.</p>
288
 
289
<p><strong>8.</strong> If the distribution and/or use of the
290
Program is restricted in certain countries either by patents
291
or by copyrighted interfaces, the original copyright holder
292
who places the Program under this License may add an explicit
293
geographical distribution limitation excluding those
294
countries, so that distribution is permitted only in or among
295
countries not thus excluded. In such case, this License
296
incorporates the limitation as if written in the body of this
297
License.</p>
298
 
299
<p><strong>9.</strong> The Free Software Foundation may
300
publish revised and/or new versions of the General Public
301
License from time to time. Such new versions will be similar
302
in spirit to the present version, but may differ in detail to
303
address new problems or concerns.</p>
304
 
305
<p>Each version is given a distinguishing version number. If
306
the Program specifies a version number of this License which
307
applies to it and &quot;any later version&quot;, you have the
308
option of following the terms and conditions either of that
309
version or of any later version published by the Free
310
Software Foundation. If the Program does not specify a
311
version number of this License, you may choose any version
312
ever published by the Free Software Foundation.</p>
313
 
314
<p><strong>10.</strong> If you wish to incorporate parts of
315
the Program into other free programs whose distribution
316
conditions are different, write to the author to ask for
317
permission. For software which is copyrighted by the Free
318
Software Foundation, write to the Free Software Foundation;
319
we sometimes make exceptions for this. Our decision will be
320
guided by the two goals of preserving the free status of all
321
derivatives of our free software and of promoting the sharing
322
and reuse of software generally.</p>
323
 
324
<p><strong>NO WARRANTY</strong></p>
325
 
326
<p><strong>11.</strong> BECAUSE THE PROGRAM IS LICENSED FREE
327
OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE
328
EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE
329
STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
330
PROVIDE THE PROGRAM &quot;AS IS&quot; WITHOUT WARRANTY OF ANY
331
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED
332
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
333
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
334
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM
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PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY
336
SERVICING, REPAIR OR CORRECTION.</p>
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338
<p><strong>12.</strong> IN NO EVENT UNLESS REQUIRED BY
339
APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT
340
HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE
341
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
342
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
343
DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
344
PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA
345
BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
346
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
347
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
348
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.</p>
349
 
350
<h2>END OF TERMS AND CONDITIONS</h2>
351
 
352
<h2>How to Apply These Terms to Your New Programs</h2>
353
 
354
<p>If you develop a new program, and you want it to be of the greatest
355
possible use to the public, the best way to achieve this is to make it
356
free software which everyone can redistribute and change under these
357
terms.</p>
358
 
359
<p>To do so, attach the following notices to the program.  It is safest
360
to attach them to the start of each source file to most effectively
361
convey the exclusion of warranty; and each file should have at least
362
the "copyright" line and a pointer to where the full notice is found.</p>
363
 
364
<pre>
365
    &lt;one line to give the program's name and a brief idea of what it does.&gt;
366
    Copyright (C) &lt;year&gt;  &lt;name of author&gt;
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368
    This program is free software; you can redistribute it and/or modify
369
    it under the terms of the GNU General Public License as published by
370
    the Free Software Foundation; either version 2 of the License, or
371
    (at your option) any later version.
372
 
373
    This program is distributed in the hope that it will be useful,
374
    but WITHOUT ANY WARRANTY; without even the implied warranty of
375
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
376
    GNU General Public License for more details.
377
 
378
    You should have received a copy of the GNU General Public License
379
    along with this program; if not, write to the Free Software
380
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
381
</pre>
382
 
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384
<p>Also add information on how to contact you by electronic and paper mail.</p>
385
 
386
<p>If the program is interactive, make it output a short notice like this
387
when it starts in an interactive mode:</p>
388
<pre>
389
    Gnomovision version 69, Copyright (C) year name of author
390
    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
391
    This is free software, and you are welcome to redistribute it
392
    under certain conditions; type `show c' for details.
393
</pre>
394
 
395
<p>The hypothetical commands `show w' and `show c' should show the appropriate
396
parts of the General Public License.  Of course, the commands you use may
397
be called something other than `show w' and `show c'; they could even be
398
mouse-clicks or menu items--whatever suits your program.</p>
399
 
400
<p>You should also get your employer (if you work as a programmer) or your
401
school, if any, to sign a "copyright disclaimer" for the program, if
402
necessary.  Here is a sample; alter the names:</p>
403
<pre>
404
  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
405
  `Gnomovision' (which makes passes at compilers) written by James Hacker.
406
 
407
  &lt;signature of Ty Coon&gt;, 1 April 1989
408
  Ty Coon, President of Vice
409
</pre>
410
 
411
<p>This General Public License does not permit incorporating your program into
412
proprietary programs.  If your program is a subroutine library, you may
413
consider it more useful to permit linking proprietary applications with the
414
library.  If this is what you want to do, use the GNU Library General
415
Public License instead of this License.</p>
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