Loader and Sound fixes
Merge pull request #726 from tobeytailor/buttons

Fixes regression in #708
Fixes shape morphing
Merge pull request #711 from yurydelendik/brsite

Few fixes to start http://www.rolando.com.br/site.html
Reduces amount of memory used by sounds
Merge pull request #728 from yurydelendik/sound-mem

Reduces amount of memory used by sounds
Removes redundant fields and arguments around handling of dimensions

Specifically, DisplayObject._x, _y, _width and _height are removed, as they're never actually read, but painstakingly kept in sync with they respective values on _currentTransform.

Also, renderDisplayObject only ever uses the given element's _currentTransform, so there's no need to pass that in explicitly.
Merge pull request #729 from tschneidereit/master

Removes redundant fields and arguments around handling of dimensions