Multiple changes: implements Domain#find, Projector#handle_event and removes deprecation warnings

You may (or may not) want to pull one or more of these commits? Included changes

* minor stuff
	* updates to REAME
	* removes deprecation warnings
* new functionality 
	* Domain#find - re-hydrates domain objects from event stream
	* Projector#handle_event - fires off event handler blocks when signaled
	
I left in 1 TODO: lib/replay/event_store.rb line: 62
Since the storage can have multiple adapters, wasn't sure which one was best for re-hydrating domain objects, so using the first one found

I have been working on a toy app experimenting with CQRS style: https://github.com/house9/blog_on_cqrs