Fixes nested clipping layers
Merge pull request #1027 from yurydelendik/sbemail41

Fixes nested clipping layers
Merge pull request #1028 from mbebenita/master

Adds HUD overlay.
Few homestarrunner site fixes
Polyfills Promises
Merge pull request #1029 from yurydelendik/dompromises

Polyfills Promises
Adds jwplayer inspector mock/test harness
Finishes loading images from the byte array
Stubs NetConnection more
Merge pull request #1031 from yurydelendik/jwplayer

Misc fixed for jwplayer
Move test mocks into separate file
Refactors Timer
Fixes set super tracing
Repainting entire stage when its invalid
Merge pull request #1035 from yurydelendik/jwplayer

Misc fixed for jwplayer
Verifier was too eager to optimize property accesses on Objects.