celluloid/celluloid — pull request #103 by schmurfy (2012-10-14 10:43:22+00:00)
Title: added use_proxy to switch actor proxy class

For a specific use case I needed to subclass the ActorProxy, here is my patch to allow switching the implementation.
I tried to match the implementation of use_mailbox and added a use_proxy class method.

I had to add a way to query the proxy class since it does a really good job at hiding itself (a little too much in my opinion).