custom starling juggler :
When pausing CE, the juggler is paused as well so AnimationSequences would stop.
However, starling should keep running and updating the context3D so that flash display objects on top of stage3D would still update.
When stage deactivates however (game in the background or 'tabbed out' starling stops altogether as expected).

let me know if I missed something. this is a first step towards a better pause/resume process I think. Also, tried placing some @inheritDoc comments so that maybe the html docs would apprear more complete as overrides would inherit their docs from the super version