1.1
-------
little bug fixes: zero width line, default open file was untitled.pic even
if it did not exist.

1.2
-------
Added bitmaps and photo images (gif/ppm/bmp/pgm)
bitmaps - editing background and foreground colors
Fixed "missing solid bitmap" bug among other bugs.
Canvas can be scrolled using "Control-Arrow-Keys", "Alt-Arrow-Keys".
Canvas dimensions = 1500x1500. Can stretch with "Contro-PageUp",
"Control-PageDown"

1.3
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Online help entry (down at the status bar).
some more bug fixes.
Now it is possible to put arrows on arcs.
