0.1 April something, 1999.  First release.
0.2 May 27, 1999.  Added a choice of 3 color maps.  Changed default
	           settings for a better look.
0.3 June something, 1999.  William Tipton added a pause button.
0.4 June 15, 1999.  Can be used a load meter.  Suggested by Richard Kuo.