gpl

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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.

		       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.