GNU GENERAL PUBLIC LICENSE

                   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.

                 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

  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.

what it does.>

    Copyright (C) 19yy  <name of author>

    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 

toredistribute 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.