# GNU GENERAL PUBLIC LICENSE

Version 2, June 1991

Copyright (C) 1989, 1991 Free Software Foundation, Inc.  
51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA

Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble

The licenses for most software are designed to take away your freedom to share 
and change it. By contrast, the GNU General Public License is intended to guarantee 
your freedom to share and change free software--to make sure the software is free 
for all its users. This General Public License applies to most of the Free 
Software Foundation's software and to any other program whose authors commit to 
using it. (Some other Free Software Foundation software is covered by the GNU 
Lesser General Public License instead.) You can apply it to your programs, too.

When we speak of free software, we are referring to freedom, not price. Our 
General Public Licenses are designed to make sure that you have the freedom to 
distribute copies of free software (and charge for this service if you wish), 
that you receive source code or can get it if you want it, that you can change 
the software or use pieces of it in new free programs; and that you know you 
can do these things.

To protect your rights, we need to make restrictions that forbid anyone to 
deny you these rights or to ask you to surrender the rights. These restrictions 
translate to certain responsibilities for you if you distribute copies of the 
software, or if you modify it.

For example, if you distribute copies of such a program, whether gratis or for 
a fee, you must give the recipients all the rights that you have. You must make 
sure that they, too, receive or can get the source code. And you must show them 
these terms so they know their rights.

We protect your rights with two steps: (1) copyright the software, and (2) 
offer you this license which gives you legal permission to copy, distribute 
and/or modify the software.

Also, for each author's protection and ours, we want to make certain that 
everyone understands that there is no warranty for this free software. If the 
software is modified by someone else and passed on, we want its recipients to 
know that what they have is not the original, so that any problems introduced 
by others will not reflect on the original authors' reputations.

Finally, any free program is threatened constantly by software patents. We wish 
to avoid the danger that redistributors of a free program will individually 
obtain patent licenses, in effect making the program proprietary. To prevent 
this, we have made it clear that any patent must be licensed for everyone's 
free use or not licensed at all.

The precise terms and conditions for copying, distribution and modification follow.

## TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. 	This License applies to any program or other work which contains a notice 
	placed by the copyright holder saying it may be distributed under the terms of 
	this General Public License. The "Program", below, refers to any such program 
	or work, and a "work based on the Program" means either the Program or any 
	derivative work under copyright law: that is to say, a work containing the 
	Program or a portion of it, either verbatim or with modifications and/or 
	translated into another language. (Hereinafter, translation is included without 
	limitation in the term "modification".) Each licensee is addressed as "you".
	
	Activities other than copying, distribution and modification are not covered by 
	this License; they are outside its scope. The act of running the Program is not 
	restricted, and the output from the Program is covered only if its contents 
	constitute a work based on the Program (independent of having been made by 
	running the Program). Whether that is true depends on what the Program does.

1. 	You may copy and distribute verbatim copies of the Program's source code as 
	you receive it, in any medium, provided that you conspicuously and appropriately 
	publish on each copy an appropriate copyright notice and disclaimer of warranty; 
	keep intact all the notices that refer to this License and to the absence of any 
	warranty; and give any other recipients of the Program a copy of this License 
	along with the Program.
	
	You may charge a fee for the physical act of transferring a copy, and you may at 
	your option offer warranty protection in exchange for a fee.
	
2. 	You may modify your copy or copies of the Program or any portion of it, thus 
	forming a work based on the Program, and copy and distribute such modifications 
	or work under the terms of Section 1 above, provided that you also meet all of 
	these conditions:
	
	a) You must cause the modified files to carry prominent notices stating that 
	   you changed the files and the date of any change.
	b) You must cause any work that you distribute or publish, that in whole or in 
	   part contains or is derived from the Program or any part thereof, to be 
	   licensed as a whole at no charge to all third parties under the terms of this 
	   License.
	c) If the modified program normally reads commands interactively when run, you
	   must cause it, when started running for such interactive use in the most 
	   ordinary way, to print or display an announcement including an appropriate 
	   copyright notice and a notice that there is no warranty (or else, saying 
	   that you provide a warranty) and that users may redistribute the program 
	   under these conditions, and telling the user how to view a copy of this 
	   License. (Exception: if the Program itself is interactive but does not 
	   normally print such an announcement, your work based on the Program is not 
	   required to print an announcement.)
	   
	These requirements apply to the modified work as a whole. If identifiable 
	sections of that work are not derived from the Program, and can be reasonably 
	considered independent and separate works in themselves, then this License, 
	and its terms, do not apply to those sections when you distribute them as 
	separate works. But when you distribute the same sections as part of a whole 
	which is a work based on the Program, the distribution of the whole must be on 
	the terms of this License, whose permissions for other licensees extend to the 
	entire whole, and thus to each and every part regardless of who wrote it.
	
	Thus, it is not the intent of this section to claim rights or contest your 
	rights to work written entirely by you; rather, the intent is to exercise the 
	right to control the distribution of derivative or collective works based on 
	the Program.
	
	In addition, mere aggregation of another work not based on the Program with the 
	Program (or with a work based on the Program) on a volume of a storage or 
	distribution medium does not bring the other work under the scope of this 
	License.
	
	3. You may copy and distribute the Program (or a work based on it, under 
	Section 2) in object code or executable form under the terms of Sections 1 
	and 2 above provided that you also do one of the following:
	
	a) Accompany it with the complete corresponding machine-readable source code, 
	   which must be distributed under the terms of Sections 1 and 2 above on a 
	   medium customarily used for software interchange; or,
	b) Accompany it with a written offer, valid for at least three years, to give
	   any third party, for a charge no more than your cost of physically 
	   performing source distribution, a complete machine-readable copy of the 
	   corresponding source code, to be distributed under the terms of Sections 1 
	   and 2 above on a medium customarily used for software interchange; or,
	c) Accompany it with the information you received as to the offer to distribute
	   corresponding source code. (This alternative is allowed only for 
	   noncommercial distribution and only if you received the program in object 
	   code or executable form with such an offer, in accord with Subsection b 
	   above.)
   
	The source code for a work means the preferred form of the work for making 
	modifications to it. For an executable work, complete source code means all the 
	source code for all modules it contains, plus any associated interface 
	definition files, plus the scripts used to control compilation and installation 
	of the executable. However, as a special exception, the source code distributed 
	need not include anything that is normally distributed (in either source or 
	binary form) with the major components (compiler, kernel, and so on) of the 
	operating system on which the executable runs, unless that component itself 
	accompanies the executable.
	
	If distribution of executable or object code is made by offering access to 
	copy from a designated place, then offering equivalent access to copy the 
	source code from the same place counts as distribution of the source code, 
	even though third parties are not compelled to copy the source along with the 
	object code.

4. 	You may not copy, modify, sublicense, or distribute the Program except as 
	expressly provided under this License. Any attempt otherwise to copy, modify, 
	sublicense or distribute the Program is void, and will automatically 
	terminate your rights under this License. However, parties who have 
	received copies, or rights, from you under this License will not have their 
	licenses terminated so long as such parties remain in full compliance.

5. 	You are not required to accept this License, since you have not signed it. 
	However, nothing else grants you permission to modify or distribute the 
	Program or its derivative works. These actions are prohibited by law if 
	you do not accept this License. Therefore, by modifying or distributing 
	the Program (or any work based on the Program), you indicate your 
	acceptance of this License to do so, and all its terms and conditions 
	for copying, distributing or modifying the Program or works based on it.

6. 	Each time you redistribute the Program (or any work based on the Program), 
	the recipient automatically receives a license from the original licensor
	to copy, distribute or modify the Program subject to these terms and 
	conditions. You may not impose any further restrictions on the recipients' 
	exercise of the rights granted herein. You are not responsible for enforcing 
	compliance by third parties to this License.

7.  If, as a consequence of a court judgment or allegation of patent infringement 
	or for any other reason (not limited to patent issues), conditions are
	imposed on you (whether by court order, agreement or otherwise) that 
	contradict the conditions of this License, they do not excuse you from the
	conditions of this License. If you cannot distribute so as to satisfy 
	simultaneously your obligations under this License and any other pertinent 
	obligations, then as a consequence you may not distribute the Program at 
	all. For example, if a patent license would not permit royalty-free 
	redistribution of the Program by all those who receive copies directly or 
	indirectly through you, then the only way you could satisfy both it and 
	this License would be to refrain entirely from distribution of the Program.

	If any portion of this section is held invalid or unenforceable under any 
	particular circumstance, the balance of the section is intended to apply 
	and the section as a whole is intended to apply in other circumstances.

	It is not the purpose of this section to induce you to infringe any patents 
	or other property right claims or to contest validity of any such claims; 
	this section has the sole purpose of protecting the integrity of the free 
	software distribution system, which is implemented by public license 
	practices. Many people have made generous contributions to the wide range 
	of software distributed through that system in reliance on consistent 
	application of that system; it is up to the author/donor to decide if he or 
	she is willing to distribute software through any other system and a 
	licensee cannot impose that choice.
	
	This section is intended to make thoroughly clear what is believed to be a 
	consequence of the rest of this License.
	
8. 	If the distribution and/or use of the Program is restricted in certain 
	countries either by patents or by copyrighted interfaces, the original 
	copyright holder who places the Program under this License may add an 
	explicit geographical distribution limitation excluding those countries, 
	so that distribution is permitted only in or among countries not thus 
	excluded. In such case, this License incorporates the limitation as if 
	written in the body of this License.

9. 	The Free Software Foundation may publish revised and/or new versions of the 
	General Public License from time to time. Such new versions will be similar 
	in spirit to the present version, but may differ in detail to address new 
	problems or concerns.

	Each version is given a distinguishing version number. If the Program 
	specifies a version number of this License which applies to it and 
	"any later version", you have the option of following the terms and 
	conditions either of that version or of any later version published 
	by the Free Software Foundation. If the Program does not specify a version 
	number of this License, you may choose any version ever published by the 
	Free Software Foundation.

10. If you wish to incorporate parts of the Program into other free programs 
	whose distribution conditions are different, write to the author to ask for 
	permission. For software which is copyrighted by the Free Software 
	Foundation, write to the Free Software Foundation; we sometimes make 
	exceptions for this. Our decision will be guided by the two goals of 
	preserving the free status of all derivatives of our free software and of 
	promoting the sharing and reuse of software generally.

NO WARRANTY

11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR 
	THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 
	OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 
	PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 
	OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
	MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO 
	THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM 
	PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR 
	CORRECTION.

12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL 
	ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE
	THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 
	GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 
	USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 
	DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 
	PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 
	EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 
	SUCH DAMAGES.

END OF TERMS AND CONDITIONS