NAME
    GNU GENERAL PUBLIC LICENSE

DESCRIPTION
    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
    GNU GENERAL PUBLIC LICENSE 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

Application
    How to Apply These Terms to Your New Programs

    If you develop a new program, and you want it to be of the
    greatest possible use to the public, the best way to achieve
    this is to make it free software which everyone can redistribute
    and change under these terms.

    To do so, attach the following notices to the program. It is
    safest to attach them to the start of each source file to most
    effectively convey the exclusion of warranty; and each file
    should have at least the "copyright" line and a pointer to where
    the full notice is found.

            This program is free software; you can redistribute it and/or
            modify it under the terms of the GNU General Public License
            as published by the Free Software Foundation; either version
            2 of the License, or (at your option) any later version.

            This program is distributed in the hope that it will be useful,
            but WITHOUT ANY WARRANTY; without even the implied warranty of
            MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
            GNU General Public License for more details.

            You should have received a copy of the GNU General Public
            License along with this program; if not, write to the Free
            Software Foundation, Inc., 59 Temple Place, Suite 330,
            Boston, MA  02111-1307  USA

    Also add information on how to contact you by electronic and
    paper mail.

    If the program is interactive, make it output a short notice
    like this when it starts in an interactive mode:

            Gnomovision version 69, Copyright (C) 19yy name of author
            Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
            type `show w'.  This is free software, and you are welcome
            to redistribute it under certain conditions; type `show c'
            for details.

    The hypothetical commands `show w' and `show c' should show the
    appropriate parts of the General Public License. Of course, the
    commands you use may be called something other than `show w' and
    `show c'; they could even be mouse-clicks or menu items--
    whatever suits your program.

    You should also get your employer (if you work as a programmer)
    or your school, if any, to sign a "copyright disclaimer" for the
    program, if necessary. Here is a sample; alter the names:

          Yoyodyne, Inc., hereby disclaims all copyright interest in the
          program `Gnomovision' (which makes passes at compilers) written
          by James Hacker.

          <signature of Ty Coon>, 1 April 1989
          Ty Coon, President of Vice

    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 Library General Public License
    instead of this License.

