GNU GENERAL PUBLIC LICENSE 

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 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