Copyright (C) Chris Pudney, The University of Western Australia, 1997.
All rights reserved.
 
Permission to use, copy, modify and distribute this software and its
documentation only for the purposes of teaching and research is hereby
granted without fee, provided that the above copyright notice and this
permission notice appear in all copies of this software/documentation
and that you do not sell the software.  No commercial use or
distribution of the software is permitted without the consent of the
copyright owners.  Commercial licensing is available by contacting the
author(s).

THIS SOFTWARE/DOCUMENTATION IS PROVIDED WITH NO WARRANTY, EXPRESS OR
IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.

This software was altered by J Leng & A Dodd of the University of
Manchester 1999.
