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- GNU GENERAL PUBLIC LICENSE
-
- Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675
- Mass Ave, Cambridge, MA 02139, 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