Merge pull request #376 from tobeytailor/master

Make sure graphics._revision gets increased on every draw operation.
Minimizes amount of addedToStage event objects; notifies all descendants
Merge pull request #377 from yurydelendik/addedToStage

Minimizes amount of addedToStage event objects; notifies all descendants
Updates jsshell version; adds SHELLABC for AVM2 test compilation
Destroying unused timeline objects
Merge pull request #372 from yurydelendik/broadcastmessage-destroy

Destroying unused timeline objects
Add unit test for flash.text::TextField
Add unit test for flash.ui::ContextMenu
Merge pull request #379 from artcompiler/tests

Unit tests for ContextMenu and TextField