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