More comment updates.
PARB feedback: Merge IAudible events into one event class.
Update some comments.
PARB feedback: Rename ViewChangeEvent to ViewEvent.
PARB feedback: Rename DimensionChangeEvent to DimensionEvent.
PARB feedback: Rename TraitsChangeEvent to MediaElementEvent.
PARB feedback: Merge IBufferable events into single event class.
Separate out SWF URL in integration tests.
PARB feedback: Move byte events into LoadEvent.
