Fix MOAITimer.EVENT_STOP

The new MOAINode::EVENT_UPDATE (enum value 0) collided with
MOAIAction::EVENT_STOP (also enum value 0) in MOAITimer, which
is derived from both Node and Action. As a result, EVENT_STOP
was triggered every frame. Fixed by starting MOAIAction events
at MOAINode::TOTAL_EVENTS, similar to MOAITimer events starting
at MOAIAction::TOTAL_EVENTS.
Merge pull request #750 from theGoodEvil/fix_timer_event_stop

Fix MOAITimer.EVENT_STOP