Version 6.0.0:
  -- 2 coredumps
  -- infinite loop in excise-chunks.
  -- provided tilde expansion in file names.
  -- Fixed cntrl C on ibm rs/6000 causing unwanted exits.
  -- WME supported by a justification that got removed was hanging around.
     No longer.
  -- Fix for a type of chunk being built that couldn't be reordered.
  -- Fix to atof to allow it to compile on a NeXT.
  -- Added warnings for things that look like they might be mistyped variables
     or mistyped disjunctions while parsing.
Version 6.0.1:
  -- added a 'version' command to give full version information from the
     interface level.
  -- rearranged the makefile slightly to prevent it recompiling executables
     whenever no object files had changed.
  -- removed the beta test notice from the startup routine.  Why this routine
     duplicates the text in 'soarnews' I'll never understand.
Version 6.0.2:
  -- Made some simple changes to make the code compile on HP Apollos.  I don't
     know if these will work on all HP machines. Time will tell.
  -- Made a few small fixes to lexer.c and to convert.c so that the program
     would compile under straight ultrix cc as well as gcc.
