EventDispatcher unaware of juggler

EventiDispatcher:dispose doesn’t dispatch anymore the
REMOVE_FROM_JUGGLER event
Simplified logic / fix of juggler add/remove/clear

- fixed clear logic
- simplified add/remove calls
Improved removeEventListeners logic

clear of proper pendingLists if removeEventListeners is called
fix on updateTransformMatrix for unstaged chains

updateTransformMatrix was failing if the chain root was a container
different from stage (i.e. Stats)