* clutter/clutter-event.c: Pop and peek the event queue
from the tail - it's a queue, not a stack.
* clutter/clutter-private.h:
* clutter/clutter-main.c: Add a boolean signal accumulator.
* clutter/clutter-stage.[ch]: Add an event argument to
the 'delete-event' signal; rename the 'input-event' signal
to 'event'; add the static scope flag to all the stage
events.