           GNU GENERAL PUBLIC LICENSE
             Version 2, June 1991

 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.

                    TERMS AND CONDITIONS FOR COPYING,
                  DISTRIBUTION AND MODIFICATION

 0. This License applies to any program or other work which
 is accompanied by 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
