Hit test boundings only if no Graphics instance exists.
Clear bounds cache if position changed.
Cleanup.
Merge pull request #686 from tobeytailor/display

Misc changes and cleanups, fixes hit testing of bitmaps
Fixes font leading/metrics; hacks to resolve font face
Merge remote-tracking branch 'mozilla/master' into fonts-1

Conflicts:
	src/flash/text/TextField.js
Merge pull request #687 from yurydelendik/fonts-1

Fixes font leading/metrics; hacks to resolve font face