0.90 (14 Mar 2001):
  Moved to using commit to maintain version numbering.
  Fixed bug#96: upcall handler uses uninitialised variables.
0.91 (24 Mar 2001):
  Added 'Quick format' option.
0.92 (26 Mar 2001):
  Removed redundant files.
  Changed Acorn reference to RISC OS.
0.93 (25 Feb 2002):
  Moved to new Makefile format.
