Make Vector methods concat and reverse fully native
Cleanup, mostly around notImplemented asserts
Replaced all dummy constructor-usages of notImplemented with a more meaningful dummyConstructor function
Implement Stage's overrides for swapChildrenAt and removeChildAt
Implement updateAfterEvent in TimerEvent and TouchEvent
Remove ObjectInput and ObjectOutput classes from the flash.utils package

There weren't used anywhere, and are completely undocumented.