Add montageDidLoad call to bootstrapping
Remove reference to isCanvasPixelArray as it doesn't exist anywhere

and throw a real error.
Define Element#eventHandlerUUID,component in registerWindow

So that elements in new windows have these properties
Define (native)addEventListener as configurable

So they can be deleted by unregisterWindow. The enumerable: false
has been removed as it is false by default.
Complete EventManager#unregisterWindow

it wasn't properly unregistering all the modifications we make to
the window prototypes
Merge pull request #1186 from Stuk/em-unregister

Event Manager unregisterWindow + more