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APPENDIX-i
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.