xsnap  initial version was written by: 
   Clauss Strauch 
   Engineering Design Research Center 
   Carnegie Mellon University.
   internet:  cbs@cad.cs.cmu.edu
   uucp:  ...!harvard!cs.cmu.edu!cbs
   BITnet:  cbs@cad.cs.cmu.edu%CMCCVMA

   Initial copyright was stated as follows :
   Permission to use, copy, modify, and distribute xsnap and its
   documentation for any purpose and without fee is hereby granted.
   xsnap is provided "as is", without express or implied warranty.

Code to output in "xwd" and "ATK raster" formats was added by:
   Bill Janssen
   Xerox Palo Alto Research Center
   <janssen@parc.xerox.com>

Code to output in xpm format was added by:
   Arnaud Le Hors
   Bull Research France -- Koala Project
   <lehors@mirsa.inria.fr>

New versions since 2000 have been developed by:
   Jean-Pierre Demailly
   Universit\'e de Grenoble I -- Institut Fourier
   <jean-pierre.demailly@ujf-grenoble.fr>

   These new versions have been put under the General Public Licence
   version 3 or later (which is compatible with the initial copyright).
