Allow key for an ExpandoObject to not be a string (it is acceptable to be an int for example).
Improved support for Error.getStackTrace().
Added extensions for uint. Will improve the registration process of extensions in a later commit.
Made URLLoader load http requests asynchronously. There is also a flag that indicates if it should be synchronous or asynchronous.
    The event is dispatched using Timer.delayCall() so it ends up on the PlayScript thread.
    Made the active timer list thread safe.
    Changed Player.LoadResource() to support loading resources from http (used the URLLoader synchronous path).