
 The GNU General Public License (GPL-2.0)
 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

