1* Improve the cairo rubber banding: allow the user to compute the size of
2  the rectangle (as with a Gimp selection for example). The Enter key
3  would be used to validate the selection.
4* When the screen is composited, show the selection instructions using a
5  transparent label.
6* Try to get borders captured with compiz.
7* Consider porting the code to use GObjects instead of structs.
8