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		1		GNU GENERAL PUBLIC LICENSE
		2
		3		Version 2, June 1991
		4
		5		Copyright (C) 1989, 1991 Free Software Foundation, Inc.
		6
		7		51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
		8
		9		Everyone is permitted to copy and distribute verbatim copies of this license
		10		document, but changing it is not allowed.
		11
		12		Preamble
		13
		14		The licenses for most software are designed to take away your freedom to share
		15		and change it. By contrast, the GNU General Public License is intended to
		16		guarantee your freedom to share and change free software--to make sure the
		17		software is free for all its users. This General Public License applies to
		18		most of the Free Software Foundation's software and to any other program whose
		19		authors commit to using it. (Some other Free Software Foundation software
		20		is covered by the GNU Lesser General Public License instead.) You can apply
		21		it to your programs, too.
		22
		23		When we speak of free software, we are referring to freedom, not price. Our
		24		General Public Licenses are designed to make sure that you have the freedom
		25		to distribute copies of free software (and charge for this service if you
		26		wish), that you receive source code or can get it if you want it, that you
		27		can change the software or use pieces of it in new free programs; and that
		28		you know you can do these things.
		29
		30		To protect your rights, we need to make restrictions that forbid anyone to
		31		deny you these rights or to ask you to surrender the rights. These restrictions
		32		translate to certain responsibilities for you if you distribute copies of
		33		the software, or if you modify it.
		34
		35		For example, if you distribute copies of such a program, whether gratis or
		36		for a fee, you must give the recipients all the rights that you have. You
		37		must make sure that they, too, receive or can get the source code. And you
		38		must show them these terms so they know their rights.
		39
		40		We protect your rights with two steps: (1) copyright the software, and (2)
		41		offer you this license which gives you legal permission to copy, distribute
		42		and/or modify the software.
		43
		44		Also, for each author's protection and ours, we want to make certain that
		45		everyone understands that there is no warranty for this free software. If
		46		the software is modified by someone else and passed on, we want its recipients
		47		to know that what they have is not the original, so that any problems introduced
		48		by others will not reflect on the original authors' reputations.
		49
		50		Finally, any free program is threatened constantly by software patents. We
		51		wish to avoid the danger that redistributors of a free program will individually
		52		obtain patent licenses, in effect making the program proprietary. To prevent
		53		this, we have made it clear that any patent must be licensed for everyone's
		54		free use or not licensed at all.
		55
		56		The precise terms and conditions for copying, distribution and modification
		57		follow.
		58
		59		TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
		60
		61		0. This License applies to any program or other work which contains a notice
		62		placed by the copyright holder saying it may be distributed under the terms
		63		of this General Public License. The "Program", below, refers to any such program
		64		or work, and a "work based on the Program" means either the Program or any
		65		derivative work under copyright law: that is to say, a work containing the
		66		Program or a portion of it, either verbatim or with modifications and/or translated
		67		into another language. (Hereinafter, translation is included without limitation
		68		in the term "modification".) Each licensee is addressed as "you".
		69
		70		Activities other than copying, distribution and modification are not covered
		71		by this License; they are outside its scope. The act of running the Program
		72		is not restricted, and the output from the Program is covered only if its
		73		contents constitute a work based on the Program (independent of having been
		74		made by running the Program). Whether that is true depends on what the Program
		75		does.
		76
		77		1. You may copy and distribute verbatim copies of the Program's source code
		78		as you receive it, in any medium, provided that you conspicuously and appropriately
		79		publish on each copy an appropriate copyright notice and disclaimer of warranty;
		80		keep intact all the notices that refer to this License and to the absence
		81		of any warranty; and give any other recipients of the Program a copy of this
		82		License along with the Program.
		83
		84		You may charge a fee for the physical act of transferring a copy, and you
		85		may at your option offer warranty protection in exchange for a fee.
		86
		87		2. You may modify your copy or copies of the Program or any portion of it,
		88		thus forming a work based on the Program, and copy and distribute such modifications
		89		or work under the terms of Section 1 above, provided that you also meet all
		90		of these conditions:
		91
		92		a) You must cause the modified files to carry prominent notices stating that
		93		you changed the files and the date of any change.
		94
		95		b) You must cause any work that you distribute or publish, that in whole or
		96		in part contains or is derived from the Program or any part thereof, to be
		97		licensed as a whole at no charge to all third parties under the terms of this
		98		License.
		99
		100		c) If the modified program normally reads commands interactively when run,
		101		you must cause it, when started running for such interactive use in the most
		102		ordinary way, to print or display an announcement including an appropriate
		103		copyright notice and a notice that there is no warranty (or else, saying that
		104		you provide a warranty) and that users may redistribute the program under
		105		these conditions, and telling the user how to view a copy of this License.
		106		(Exception: if the Program itself is interactive but does not normally print
		107		such an announcement, your work based on the Program is not required to print
		108		an announcement.)
		109
		110		These requirements apply to the modified work as a whole. If identifiable
		111		sections of that work are not derived from the Program, and can be reasonably
		112		considered independent and separate works in themselves, then this License,
		113		and its terms, do not apply to those sections when you distribute them as
		114		separate works. But when you distribute the same sections as part of a whole
		115		which is a work based on the Program, the distribution of the whole must be
		116		on the terms of this License, whose permissions for other licensees extend
		117		to the entire whole, and thus to each and every part regardless of who wrote
		118		it.
		119
		120		Thus, it is not the intent of this section to claim rights or contest your
		121		rights to work written entirely by you; rather, the intent is to exercise
		122		the right to control the distribution of derivative or collective works based
		123		on the Program.
		124
		125		In addition, mere aggregation of another work not based on the Program with
		126		the Program (or with a work based on the Program) on a volume of a storage
		127		or distribution medium does not bring the other work under the scope of this
		128		License.
		129
		130		3. You may copy and distribute the Program (or a work based on it, under Section
		131		2) in object code or executable form under the terms of Sections 1 and 2 above
		132		provided that you also do one of the following:
		133
		134		a) Accompany it with the complete corresponding machine-readable source code,
		135		which must be distributed under the terms of Sections 1 and 2 above on a medium
		136		customarily used for software interchange; or,
		137
		138		b) Accompany it with a written offer, valid for at least three years, to give
		139		any third party, for a charge no more than your cost of physically performing
		140		source distribution, a complete machine-readable copy of the corresponding
		141		source code, to be distributed under the terms of Sections 1 and 2 above on
		142		a medium customarily used for software interchange; or,
		143
		144		c) Accompany it with the information you received as to the offer to distribute
		145		corresponding source code. (This alternative is allowed only for noncommercial
		146		distribution and only if you received the program in object code or executable
		147		form with such an offer, in accord with Subsection b above.)
		148
		149		The source code for a work means the preferred form of the work for making
		150		modifications to it. For an executable work, complete source code means all
		151		the source code for all modules it contains, plus any associated interface
		152		definition files, plus the scripts used to control compilation and installation
		153		of the executable. However, as a special exception, the source code distributed
		154		need not include anything that is normally distributed (in either source or
		155		binary form) with the major components (compiler, kernel, and so on) of the
		156		operating system on which the executable runs, unless that component itself
		157		accompanies the executable.
		158
		159		If distribution of executable or object code is made by offering access to
		160		copy from a designated place, then offering equivalent access to copy the
		161		source code from the same place counts as distribution of the source code,
		162		even though third parties are not compelled to copy the source along with
		163		the object code.
		164
		165		4. You may not copy, modify, sublicense, or distribute the Program except
		166		as expressly provided under this License. Any attempt otherwise to copy, modify,
		167		sublicense or distribute the Program is void, and will automatically terminate
		168		your rights under this License. However, parties who have received copies,
		169		or rights, from you under this License will not have their licenses terminated
		170		so long as such parties remain in full compliance.
		171
		172		5. You are not required to accept this License, since you have not signed
		173		it. However, nothing else grants you permission to modify or distribute the
		174		Program or its derivative works. These actions are prohibited by law if you
		175		do not accept this License. Therefore, by modifying or distributing the Program
		176		(or any work based on the Program), you indicate your acceptance of this License
		177		to do so, and all its terms and conditions for copying, distributing or modifying
		178		the Program or works based on it.
		179
		180		6. Each time you redistribute the Program (or any work based on the Program),
		181		the recipient automatically receives a license from the original licensor
		182		to copy, distribute or modify the Program subject to these terms and conditions.
		183		You may not impose any further restrictions on the recipients' exercise of
		184		the rights granted herein. You are not responsible for enforcing compliance
		185		by third parties to this License.
		186
		187		7. If, as a consequence of a court judgment or allegation of patent infringement
		188		or for any other reason (not limited to patent issues), conditions are imposed
		189		on you (whether by court order, agreement or otherwise) that contradict the
		190		conditions of this License, they do not excuse you from the conditions of
		191		this License. If you cannot distribute so as to satisfy simultaneously your
		192		obligations under this License and any other pertinent obligations, then as
		193		a consequence you may not distribute the Program at all. For example, if a
		194		patent license would not permit royalty-free redistribution of the Program
		195		by all those who receive copies directly or indirectly through you, then the
		196		only way you could satisfy both it and this License would be to refrain entirely
		197		from distribution of the Program.
		198
		199		If any portion of this section is held invalid or unenforceable under any
		200		particular circumstance, the balance of the section is intended to apply and
		201		the section as a whole is intended to apply in other circumstances.
		202
		203		It is not the purpose of this section to induce you to infringe any patents
		204		or other property right claims or to contest validity of any such claims;
		205		this section has the sole purpose of protecting the integrity of the free
		206		software distribution system, which is implemented by public license practices.
		207		Many people have made generous contributions to the wide range of software
		208		distributed through that system in reliance on consistent application of that
		209		system; it is up to the author/donor to decide if he or she is willing to
		210		distribute software through any other system and a licensee cannot impose
		211		that choice.
		212
		213		This section is intended to make thoroughly clear what is believed to be a
		214		consequence of the rest of this License.
		215
		216		8. If the distribution and/or use of the Program is restricted in certain
		217		countries either by patents or by copyrighted interfaces, the original copyright
		218		holder who places the Program under this License may add an explicit geographical
		219		distribution limitation excluding those countries, so that distribution is
		220		permitted only in or among countries not thus excluded. In such case, this
		221		License incorporates the limitation as if written in the body of this License.
		222
		223		9. The Free Software Foundation may publish revised and/or new versions of
		224		the General Public License from time to time. Such new versions will be similar
		225		in spirit to the present version, but may differ in detail to address new
		226		problems or concerns.
		227
		228		Each version is given a distinguishing version number. If the Program specifies
		229		a version number of this License which applies to it and "any later version",
		230		you have the option of following the terms and conditions either of that version
		231		or of any later version published by the Free Software Foundation. If the
		232		Program does not specify a version number of this License, you may choose
		233		any version ever published by the Free Software Foundation.
		234
		235		10. If you wish to incorporate parts of the Program into other free programs
		236		whose distribution conditions are different, write to the author to ask for
		237		permission. For software which is copyrighted by the Free Software Foundation,
		238		write to the Free Software Foundation; we sometimes make exceptions for this.
		239		Our decision will be guided by the two goals of preserving the free status
		240		of all derivatives of our free software and of promoting the sharing and reuse
		241		of software generally.
		242
		243		NO WARRANTY
		244
		245		11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR
		246		THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE
		247		STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM
		248		"AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
		249		BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
		250		FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
		251		OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
		252		THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
		253
		254		12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
		255		WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE
		256		THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
		257		GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
		258		OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA
		259		OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES
		260		OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
		261		HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
		262		END OF TERMS AND CONDITIONS
		263
		264		How to Apply These Terms to Your New Programs
		265
		266		If you develop a new program, and you want it to be of the greatest possible
		267		use to the public, the best way to achieve this is to make it free software
		268		which everyone can redistribute and change under these terms.
		269
		270		To do so, attach the following notices to the program. It is safest to attach
		271		them to the start of each source file to most effectively convey the exclusion
		272		of warranty; and each file should have at least the "copyright" line and a
		273		pointer to where the full notice is found.
		274
		275		<one line to give the program's name and an idea of what it does.>
		276
		277		Copyright (C)< yyyy> <name of author>
		278
		279		This program is free software; you can redistribute it and/or modify it under
		280		the terms of the GNU General Public License as published by the Free Software
		281		Foundation; either version 2 of the License, or (at your option) any later
		282		version.
		283
		284		This program is distributed in the hope that it will be useful, but WITHOUT
		285		ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
		286		FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
		287
		288		You should have received a copy of the GNU General Public License along with
		289		this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
		290		Street, Fifth Floor, Boston, MA 02110-1301, USA.
		291
		292		Also add information on how to contact you by electronic and paper mail.
		293
		294		If the program is interactive, make it output a short notice like this when
		295		it starts in an interactive mode:
		296
		297		Gnomovision version 69, Copyright (C) year name of author Gnomovision comes
		298		with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
		299		and you are welcome to redistribute it under certain conditions; type `show
		300		c' for details.
		301
		302		The hypothetical commands `show w' and `show c' should show the appropriate
		303		parts of the General Public License. Of course, the commands you use may be
		304		called something other than `show w' and `show c'; they could even be mouse-clicks
		305		or menu items--whatever suits your program.
		306
		307		You should also get your employer (if you work as a programmer) or your school,
		308		if any, to sign a "copyright disclaimer" for the program, if necessary. Here
		309		is a sample; alter the names:
		310
		311		Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision'
		312		(which makes passes at compilers) written by James Hacker.
		313
		314		<signature of Ty Coon >, 1 April 1989 Ty Coon, President of Vice This General
		315		Public License does not permit incorporating your program into proprietary
		316		programs. If your program is a subroutine library, you may consider it more
		317		useful to permit linking proprietary applications with the library. If this
		318		is what you want to do, use the GNU Lesser General Public License instead
		319		of this License.