
20010327
	Completed the basics of having two displayed measurements by adding
	a guile function and some menu code to flip between the
	built-in "val(cursor1)" and "val(cursor1)-val(cursor0)" functions 
	for the second measurement.

20010822
	Enhance file-reading to handle the spice3raw variant produced by
	Silvaco's SmartSpice.
	Handle log scales properly for plotting with GNU Graph.
	
20010911
	Better handling of logscale-X, zooming and scrollbar due to a
	patch from Paul Maurer

20010927
	configure now rejects non-GNU versions of "graph" even if they're
	earlier in $PATH

20011020
	Clean abort with better error message if we can't find the scheme
	files or they're fouled up
