Instead of having the input driver push the events into the core server,
only to have the server call back out to the compositor hooks, the driver now
just calls the compositor directly. The input drivers are always dependent on
the type of compositor anyway so there was no point in passing the events
through the server. Now the server is only involved when it's time to actually
send the events to the clients.
The gears code is moved into a new file gearc.c and the window decoration
and management code stays in window.c. A new application 'terminal' is the
second user of the windowing code, but doesn't do anything useful yet.
