Fix bounding calculation.
Fix transform.
Merge pull request #944 from tobeytailor/display

Misc display fixes
Always return a copy when accessing transform.
Ignore timeline commands for objects animated by scripts.
Merge pull request #947 from tobeytailor/display

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

Add root to stage before running its constructor.