Add root to stage before running its constructor.
Merge pull request #948 from tobeytailor/timeline

Add root to stage before running its constructor.
Merge pull request #949 from mbebenita/master

Fix removeChildren
Fix display list.
Merge pull request #952 from tobeytailor/timeline

Fixes timeline updates
Extract parsing functionality out of Loader.js into swf/resourceloader.js

resourceloader is the new main entry point into the parsing worker, but can optionally and seamlessly also run on the main thread.
Caches often used bitmapdata
Merge pull request #942 from yurydelendik/cache-bmp

Caches often used bitmapdata
Merge pull request #953 from tschneidereit/master

Extract parsing functionality out of Loader.js into swf/resourceloader.js
Overrides.