When the user clicks on "Activities", adjust the input shape
to the whole screen and show a black overlay group. Actually, the
black should be *beneath* the window actors and the overlay group
transparent so we can fade in the black while leaving the windows
unfaded, visible, but shrunk and rearranged.
svn path=/trunk/; revision=14
Add a top panel with a label "Activities" you can click on and
a HH:MM:SS clock. (A little more and we'll be caught up to gnome-0.9.)
svn path=/trunk/; revision=10