add demoline + demospline
Add cap styles, widget shapes, text alignment and arcs Change
    circle/ellipse API.
Capture button events.
Use Lozenge shape for output
Drag lines with the mouse
drag splines with the mouse
move '1' right a bit
Convert dispatch result to boool
was mis-computing delegate and crashing when window->event was NULL
Map X button info to twin mask
draw different stuff.
24 files changed