xbitmap1	simplest bitmap editor, using BitmapEdit
xbitmap2	add small pixmaps to xbitmap1, using XmDrawingArea.
xbitmap3	add small pixmaps to xbitmap1, using XmPrimitive.
xbitmap4	implement xbitmap1 NOT USING BitmapEdit
xbitmap5	using BitmapEdit, both reads and writes standard bitmap files.

BitmapEdit.c	Source file for BitmapEdit widget, described in chapters 6 and 7.
BitmapEdiP.h	Private include file for BitmapEdit, described in Chapter 6.
BitmapEdit.h	Public include file for BitmapEdit, described in Chapter 6.
