Actors in AutoMockable

[Daedren]

AutoMockable unfortunately doesn't work with actors without some changes.
On protocols, the nominal type on the mock needs to change from "class" to "actor" in case Actor is an inherited type.
There must also be setter functions for each of the mock's variables (ThrowableError, ReturnValue, CallsCount, etc) as they can't be mutated from outside the actor.