Dawn E.
cs184-ax
HW #2

This program will compile on the hp's.

Optional features implemented in this version:
    o Graceful handling of middle button click after only 1 or 2 points
      have been drawn.  (If 2 points are drawn, a line will appear on the
      screen but not in the GLIDE output.)
    o Graceful handling of right button click while in the middle of
      drawing a polygon.  (Finishes the polygon as if the middle button
      had been clicked and then quits.)
    o Color for polygons.  Colors are chosen by pressing keys on the
      keyboard.  These are the currently supported colors and their
      corresponding keyboard keys:
      
          type 'r' for red
	       'o'     orange
	       'y'     yellow
	       'g'     green
	       'b'     blue
	       'p'     purple
	       'w'     white
	       'e'     grey
	       'k'     black

      Colors can only be changed *before* the first point of the current
      polygon has been clicked.  The default color is white.