The GNU General Public License (GPL)
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 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 Library 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 theProgram 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

