
    Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
      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 Lesser 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.
    GNU GENERAL PUBLIC LICENSE
      TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
    q+c
        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.
      y\
        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.
      M@'U>[djt}oum @ q
        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:
        &n,!
            You must cause the modified files to carry prominent notices
            stating that you changed the files and the date of any change.
          -Atov$&0`]Tb=Uz
            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.
          $
n
            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.
      4:$f76@i7oxJfO
        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:
        c
            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,
          u,?,jk+cCKw
            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,
          n7T5Knm};jJ~Hag"Hq
[
            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.
      Cgs,PUU@x%
        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.
      sCR\5.2
        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.
      yzSRg
        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.
      #&b~S
        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.
      !=<HenmDaxX>m82v
        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.
      6Nnyb~9DHM&U()jt$
        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.
      CAl[+ [GWPpe'g
        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
      vUq~#KS
        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.
      
        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.
    
    This General Public License does not permit incorporating your program into
        proprietary programs.  If your program is a subroutine library, you may
        consider it more useful to permit linking proprietary applications with the
        library.  If this is what you want to do, use the GNU Lesser General
        Public License instead of this License.