GNU GENERAL PUBLIC LICENSE

Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. 

Everyone is permitted to copy and distribute verbatim copies

of this license document, but changing it is not allowed.

Preamble

The GNU General Public License is a free, copyleft license for

software and other kinds of works.

The licenses for most software and other practical works are designed

to take away your freedom to share and change the works. By contrast,

the GNU General Public License is intended to guarantee your freedom to

share and change all versions of a program--to make sure it remains free

software for all its users. We, the Free Software Foundation, use the

GNU General Public License for most of our software; it applies also to

any other work released this way by its authors. You can apply it to

your programs, too.

When we speak of free software, we are referring to freedom, not

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them 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

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To protect your rights, we need to prevent others from denying you

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certain responsibilities if you distribute copies of the software, or if

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For example, if you distribute copies of such a program, whether

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know their rights.

Developers that use the GNU GPL protect your rights with two steps:

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For the developers' and authors' protection, the GPL clearly explains

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Some devices are designed to deny users access to install or run

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States should not allow patents to restrict development and use of

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patents cannot be used to render the program non-free.

The precise terms and conditions for copying, distribution and

modification follow.

TERMS AND CONDITIONS

0. Definitions.

"This License" refers to version 3 of the GNU General Public License.

"Copyright" also means copyright-like laws that apply to other kinds of

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"The Program" refers to any copyrightable work licensed under this

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A "covered work" means either the unmodified Program or a work based

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To "propagate" a work means to do anything with it that, without

permission, would make you directly or secondarily liable for

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public, and in some countries other activities as well.

To "convey" a work means any kind of propagation that enables other

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1. Source Code.

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The Corresponding Source need not include anything that users

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The Corresponding Source for a work in source code form is that

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All rights granted under this License are granted for the term of

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permission to run the unmodified Program. The output from running a

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keep intact all notices of the absence of any warranty; and give all

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customarily used for software interchange.

b) Convey the object code in, or embodied in, a physical product

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written offer, valid for at least three years and valid for as

long as you offer spare parts or customer support for that product

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copy of the Corresponding Source for all the software in the

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c) Convey individual copies of the object code with a copy of the

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"Installation Information" for a User Product means any methods,

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If you convey an object code work under this section in, or with, or

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The requirement to provide Installation Information does not include a

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Corresponding Source conveyed, and Installation Information provided,

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7. Additional Terms.

"Additional permissions" are terms that supplement the terms of this

License by making exceptions from one or more of its conditions.

Additional permissions that are applicable to the entire Program shall

be treated as though they were included in this License, to the extent

that they are valid under applicable law. If additional permissions

apply only to part of the Program, that part may be used separately

under those permissions, but the entire Program remains governed by

this License without regard to the additional permissions.

When you convey a copy of a covered work, you may at your option

remove any additional permissions from that copy, or from any part of

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Notwithstanding any other provision of this License, for material you

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terms of sections 15 and 16 of this License; or

b) Requiring preservation of specified reasonable legal notices or

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All other non-permissive additional terms are considered "further

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Additional terms, permissive or non-permissive, may be stated in the

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8. Termination.

You may not propagate or modify a covered work except as expressly

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this License (including any patent licenses granted under the third

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However, if you cease all violation of this License, then your

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provisionally, unless and until the copyright holder explicitly and

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Moreover, your license from a particular copyright holder is

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violation by some reasonable means, this is the first time you have

received notice of violation of this License (for any work) from that

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your receipt of the notice.

Termination of your rights under this section does not terminate the

licenses of parties who have received copies or rights from you under

this License. If your rights have been terminated and not permanently

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material under section 10.

9. Acceptance Not Required for Having Copies.

You are not required to accept this License in order to receive or

run a copy of the Program. Ancillary propagation of a covered work

occurring solely as a consequence of using peer-to-peer transmission

to receive a copy likewise does not require acceptance. However,

nothing other than this License grants you permission to propagate or

modify any covered work. These actions infringe copyright if you do

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10. Automatic Licensing of Downstream Recipients.

Each time you convey a covered work, the recipient automatically

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propagate that work, subject to this License. You are not responsible

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An "entity transaction" is a transaction transferring control of an

organization, or substantially all assets of one, or subdividing an

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work results from an entity transaction, each party to that

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the predecessor has it or can get it with reasonable efforts.

You may not impose any further restrictions on the exercise of the

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rights granted under this License, and you may not initiate litigation

(including a cross-claim or counterclaim in a lawsuit) alleging that

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11. Patents.

A "contributor" is a copyright holder who authorizes use under this

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work thus licensed is called the contributor's "contributor version".

A contributor's "essential patent claims" are all patent claims

owned or controlled by the contributor, whether already acquired or

hereafter acquired, that would be infringed by some manner, permitted

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but do not include claims that would be infringed only as a

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Each contributor grants you a non-exclusive, worldwide, royalty-free

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In the following three paragraphs, a "patent license" is any express

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If you convey a covered work, knowingly relying on a patent license,

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actual knowledge that, but for the patent license, your conveying the

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in a country, would infringe one or more identifiable patents in that

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If, pursuant to or in connection with a single transaction or

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work and works based on it.

A patent license is "discriminatory" if it does not include within

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conditioned on the non-exercise of one or more of the rights that are

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