event: Added base and cycle_task events.
vector: Added ostream inserter.
rect: Added ostream inserter.
event: Added empty event_c.
event: Added cycle_task_c.
rect: Included ostream for inserter.
Added WHIM_UNREFERENCED().
event: Added equality for cycle_task_event_c.
event: Trivial layout correction in cycle-task-event.hpp.
event: Added event_target_c, event_c::dispatch.