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+GNU GENERAL PUBLIC LICENSE
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+
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+Version 2, June 1991
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+
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+Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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+
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+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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+
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+Everyone is permitted to copy and distribute verbatim copies of this license
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+document, but changing it is not allowed.
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+
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+Preamble
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+
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+The licenses for most software are designed to take away your freedom to share
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+and change it. By contrast, the GNU General Public License is intended to
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+guarantee your freedom to share and change free software--to make sure the
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+software is free for all its users. This General Public License applies to
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+most of the Free Software Foundation's software and to any other program whose
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+authors commit to using it. (Some other Free Software Foundation software
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+is covered by the GNU Lesser General Public License instead.) You can apply
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+it to your programs, too.
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+
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+When we speak of free software, we are referring to freedom, not price. Our
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+General Public Licenses are designed to make sure that you have the freedom
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+to distribute copies of free software (and charge for this service if you
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+wish), that you receive source code or can get it if you want it, that you
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+can change the software or use pieces of it in new free programs; and that
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+you know you can do these things.
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+
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+To protect your rights, we need to make restrictions that forbid anyone to
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+deny you these rights or to ask you to surrender the rights. These restrictions
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+translate to certain responsibilities for you if you distribute copies of
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+the software, or if you modify it.
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+
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+For example, if you distribute copies of such a program, whether gratis or
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+for a fee, you must give the recipients all the rights that you have. You
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+must make sure that they, too, receive or can get the source code. And you
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+must show them these terms so they know their rights.
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+
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+We protect your rights with two steps: (1) copyright the software, and (2)
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+offer you this license which gives you legal permission to copy, distribute
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+and/or modify the software.
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+
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+Also, for each author's protection and ours, we want to make certain that
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+everyone understands that there is no warranty for this free software. If
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+the software is modified by someone else and passed on, we want its recipients
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+to know that what they have is not the original, so that any problems introduced
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+by others will not reflect on the original authors' reputations.
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+
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+Finally, any free program is threatened constantly by software patents. We
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+wish to avoid the danger that redistributors of a free program will individually
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+obtain patent licenses, in effect making the program proprietary. To prevent
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+this, we have made it clear that any patent must be licensed for everyone's
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+free use or not licensed at all.
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+
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+The precise terms and conditions for copying, distribution and modification
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+follow.
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+
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+TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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+
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+0. This License applies to any program or other work which contains a notice
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+placed by the copyright holder saying it may be distributed under the terms
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+of this General Public License. The "Program", below, refers to any such program
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+or work, and a "work based on the Program" means either the Program or any
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+derivative work under copyright law: that is to say, a work containing the
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+Program or a portion of it, either verbatim or with modifications and/or translated
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+into another language. (Hereinafter, translation is included without limitation
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+in the term "modification".) Each licensee is addressed as "you".
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+
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+Activities other than copying, distribution and modification are not covered
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+by this License; they are outside its scope. The act of running the Program
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+is not restricted, and the output from the Program is covered only if its
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+contents constitute a work based on the Program (independent of having been
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+made by running the Program). Whether that is true depends on what the Program
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+does.
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+
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+1. You may copy and distribute verbatim copies of the Program's source code
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+as you receive it, in any medium, provided that you conspicuously and appropriately
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+publish on each copy an appropriate copyright notice and disclaimer of warranty;
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+keep intact all the notices that refer to this License and to the absence
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+of any warranty; and give any other recipients of the Program a copy of this
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+License along with the Program.
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+
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+You may charge a fee for the physical act of transferring a copy, and you
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+may at your option offer warranty protection in exchange for a fee.
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+
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+2. You may modify your copy or copies of the Program or any portion of it,
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+thus forming a work based on the Program, and copy and distribute such modifications
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+or work under the terms of Section 1 above, provided that you also meet all
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+of these conditions:
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+
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+a) You must cause the modified files to carry prominent notices stating that
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+you changed the files and the date of any change.
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+
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+b) You must cause any work that you distribute or publish, that in whole or
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+in part contains or is derived from the Program or any part thereof, to be
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+licensed as a whole at no charge to all third parties under the terms of this
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+License.
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+
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+c) If the modified program normally reads commands interactively when run,
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+you must cause it, when started running for such interactive use in the most
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+ordinary way, to print or display an announcement including an appropriate
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+copyright notice and a notice that there is no warranty (or else, saying that
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+you provide a warranty) and that users may redistribute the program under
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+these conditions, and telling the user how to view a copy of this License.
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+(Exception: if the Program itself is interactive but does not normally print
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+such an announcement, your work based on the Program is not required to print
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+an announcement.)
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+
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+These requirements apply to the modified work as a whole. If identifiable
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+sections of that work are not derived from the Program, and can be reasonably
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+considered independent and separate works in themselves, then this License,
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+and its terms, do not apply to those sections when you distribute them as
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+separate works. But when you distribute the same sections as part of a whole
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+which is a work based on the Program, the distribution of the whole must be
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+on the terms of this License, whose permissions for other licensees extend
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+to the entire whole, and thus to each and every part regardless of who wrote
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+it.
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+
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+Thus, it is not the intent of this section to claim rights or contest your
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+rights to work written entirely by you; rather, the intent is to exercise
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+the right to control the distribution of derivative or collective works based
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+on the Program.
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+
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+In addition, mere aggregation of another work not based on the Program with
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+the Program (or with a work based on the Program) on a volume of a storage
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+or distribution medium does not bring the other work under the scope of this
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+License.
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+
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+3. You may copy and distribute the Program (or a work based on it, under Section
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+2) in object code or executable form under the terms of Sections 1 and 2 above
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+provided that you also do one of the following:
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+
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+a) Accompany it with the complete corresponding machine-readable source code,
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+which must be distributed under the terms of Sections 1 and 2 above on a medium
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+customarily used for software interchange; or,
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+
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+b) Accompany it with a written offer, valid for at least three years, to give
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+any third party, for a charge no more than your cost of physically performing
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+source distribution, a complete machine-readable copy of the corresponding
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+source code, to be distributed under the terms of Sections 1 and 2 above on
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+a medium customarily used for software interchange; or,
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+
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+c) Accompany it with the information you received as to the offer to distribute
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+corresponding source code. (This alternative is allowed only for noncommercial
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+distribution and only if you received the program in object code or executable
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+form with such an offer, in accord with Subsection b above.)
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+
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+The source code for a work means the preferred form of the work for making
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+modifications to it. For an executable work, complete source code means all
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+the source code for all modules it contains, plus any associated interface
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+definition files, plus the scripts used to control compilation and installation
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+of the executable. However, as a special exception, the source code distributed
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+need not include anything that is normally distributed (in either source or
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+binary form) with the major components (compiler, kernel, and so on) of the
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+operating system on which the executable runs, unless that component itself
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+accompanies the executable.
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+
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+If distribution of executable or object code is made by offering access to
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+copy from a designated place, then offering equivalent access to copy the
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+source code from the same place counts as distribution of the source code,
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+even though third parties are not compelled to copy the source along with
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+the object code.
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+
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+4. You may not copy, modify, sublicense, or distribute the Program except
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+as expressly provided under this License. Any attempt otherwise to copy, modify,
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+sublicense or distribute the Program is void, and will automatically terminate
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+your rights under this License. However, parties who have received copies,
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+or rights, from you under this License will not have their licenses terminated
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+so long as such parties remain in full compliance.
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+
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+5. You are not required to accept this License, since you have not signed
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+it. However, nothing else grants you permission to modify or distribute the
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+Program or its derivative works. These actions are prohibited by law if you
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+do not accept this License. Therefore, by modifying or distributing the Program
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+(or any work based on the Program), you indicate your acceptance of this License
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+to do so, and all its terms and conditions for copying, distributing or modifying
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+the Program or works based on it.
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+
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+6. Each time you redistribute the Program (or any work based on the Program),
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+the recipient automatically receives a license from the original licensor
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+to copy, distribute or modify the Program subject to these terms and conditions.
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+You may not impose any further restrictions on the recipients' exercise of
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+the rights granted herein. You are not responsible for enforcing compliance
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+by third parties to this License.
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+
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+7. If, as a consequence of a court judgment or allegation of patent infringement
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+or for any other reason (not limited to patent issues), conditions are imposed
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+on you (whether by court order, agreement or otherwise) that contradict the
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+conditions of this License, they do not excuse you from the conditions of
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+this License. If you cannot distribute so as to satisfy simultaneously your
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+obligations under this License and any other pertinent obligations, then as
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+a consequence you may not distribute the Program at all. For example, if a
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+patent license would not permit royalty-free redistribution of the Program
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+by all those who receive copies directly or indirectly through you, then the
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+only way you could satisfy both it and this License would be to refrain entirely
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+from distribution of the Program.
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+
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+If any portion of this section is held invalid or unenforceable under any
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+particular circumstance, the balance of the section is intended to apply and
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+the section as a whole is intended to apply in other circumstances.
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+
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+It is not the purpose of this section to induce you to infringe any patents
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+or other property right claims or to contest validity of any such claims;
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+this section has the sole purpose of protecting the integrity of the free
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+software distribution system, which is implemented by public license practices.
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+Many people have made generous contributions to the wide range of software
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+distributed through that system in reliance on consistent application of that
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+system; it is up to the author/donor to decide if he or she is willing to
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+distribute software through any other system and a licensee cannot impose
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+that choice.
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+
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+This section is intended to make thoroughly clear what is believed to be a
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+consequence of the rest of this License.
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+
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+8. If the distribution and/or use of the Program is restricted in certain
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+countries either by patents or by copyrighted interfaces, the original copyright
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+holder who places the Program under this License may add an explicit geographical
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+distribution limitation excluding those countries, so that distribution is
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+permitted only in or among countries not thus excluded. In such case, this
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+License incorporates the limitation as if written in the body of this License.
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+
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+9. The Free Software Foundation may publish revised and/or new versions of
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+the General Public License from time to time. Such new versions will be similar
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+in spirit to the present version, but may differ in detail to address new
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+problems or concerns.
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+
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+Each version is given a distinguishing version number. If the Program specifies
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+a version number of this License which applies to it and "any later version",
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+you have the option of following the terms and conditions either of that version
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+or of any later version published by the Free Software Foundation. If the
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+Program does not specify a version number of this License, you may choose
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+any version ever published by the Free Software Foundation.
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+
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+10. If you wish to incorporate parts of the Program into other free programs
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+whose distribution conditions are different, write to the author to ask for
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+permission. For software which is copyrighted by the Free Software Foundation,
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+write to the Free Software Foundation; we sometimes make exceptions for this.
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+Our decision will be guided by the two goals of preserving the free status
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+of all derivatives of our free software and of promoting the sharing and reuse
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+of software generally.
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+
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+ NO WARRANTY
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+
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+11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR
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+THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE
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+STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM
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+"AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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+FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
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+OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
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+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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+
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+12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE
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+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
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+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
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+OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA
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+OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES
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+OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
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+HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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+END OF TERMS AND CONDITIONS
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+
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+How to Apply These Terms to Your New Programs
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+
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+If you develop a new program, and you want it to be of the greatest possible
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+use to the public, the best way to achieve this is to make it free software
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+which everyone can redistribute and change under these terms.
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+
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+To do so, attach the following notices to the program. It is safest to attach
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+them to the start of each source file to most effectively convey the exclusion
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+of warranty; and each file should have at least the "copyright" line and a
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+pointer to where the full notice is found.
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+
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+<one line to give the program's name and an idea of what it does.>
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+
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+Copyright (C) <yyyy> <name of author>
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+
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+This program is free software; you can redistribute it and/or modify it under
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+the terms of the GNU General Public License as published by the Free Software
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+Foundation; either version 2 of the License, or (at your option) any later
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+version.
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+
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+This program is distributed in the hope that it will be useful, but WITHOUT
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+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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+FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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+
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+You should have received a copy of the GNU General Public License along with
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+this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
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+Street, Fifth Floor, Boston, MA 02110-1301, USA.
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+
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+Also add information on how to contact you by electronic and paper mail.
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+
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+If the program is interactive, make it output a short notice like this when
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+it starts in an interactive mode:
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+
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+Gnomovision version 69, Copyright (C) year name of author Gnomovision comes
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+with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
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+and you are welcome to redistribute it under certain conditions; type `show
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+c' for details.
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+
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+The hypothetical commands `show w' and `show c' should show the appropriate
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+parts of the General Public License. Of course, the commands you use may be
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+called something other than `show w' and `show c'; they could even be mouse-clicks
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+or menu items--whatever suits your program.
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+
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+You should also get your employer (if you work as a programmer) or your school,
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+if any, to sign a "copyright disclaimer" for the program, if necessary. Here
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+is a sample; alter the names:
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+
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+Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision'
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+(which makes passes at compilers) written by James Hacker.
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+
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+<signature of Ty Coon>, 1 April 1989 Ty Coon, President of Vice This General
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+Public License does not permit incorporating your program into proprietary
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+programs. If your program is a subroutine library, you may consider it more
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+useful to permit linking proprietary applications with the library. If this
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+is what you want to do, use the GNU Lesser General Public License instead
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+of this License.
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