Merge pull request #144 from mbebenita/master

Bug fixes.
Fixes keyDown for Chrome
Remember class in the instance constructor. This allows is to get access to the class easily, for instance |flash.events.Event.class|
Implement tabEnabled and focusRect properties of InteractiveObject.
Adds assertion.
Implements callsupervoid in the compiler.
Flash player classes should be coerce callable, for instance |DisplayObject(x)|.