* clutter/clutter-actor.h:
        * clutter/clutter-actor.c:
        Add new API clutter_actor_move_by(), clutter_actor_get_size()

        * clutter/clutter-alpha.c:
        * clutter/clutter-alpha.h:
        Add clutter alpha sine func

        * clutter/clutter-behaviours.h:
        * clutter/clutter-behaviours.c:
        Add a basic scale behaviour (needs work)

        * examples/behave.c: (main):
        More playing with new behaviour functionality

        * clutter/clutter-feature.c:
        * clutter/clutter-feature.h:
        * clutter/clutter-main.c:
        Add new experimental sync to vblank code
        Set env CLUTTER_VBLANK=none to disable.