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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 (±) 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.

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Terms & conditions for copying, distribution, & 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.

±.

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.)

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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.

².

You may copy and distribute the Program (or a work based on it, under Section

±) in object code or executable form under the terms of Sections 1 and ± 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 ± 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 ± 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.

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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.

³.

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.

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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.