dillon1000/react

Extract setState, setProps etc into ReactUpdateQueue

I originally did this work so that we could allow setState to be called
before the internal ReactCompositeComponent was constructed. It's unlikely
that we'll go down that route now but this still seems like a better
abstraction. It communicates that this is not immediately updating an
object oriented class. It's just a queue which a minor optimization.
It also avoids bloating the ReactCompositeComponent file.

Since they both depend on the life cycle I break that out into a common
shared dependency. In a follow up I'll refactor the life-cycle management.