finished the EndpointRegistry
integrating the AkkaProtocolHandle and AssociationHandle into the EndpointManager
starting work on endpoint actors
working on EndpointRegistrySpec; implement Props.empty
completed EndpointRegistrySpec; all tests pass
completed DefaultMessageDispatcher
working on EndpointWriter
implementing the components used for ACKing messages
implementing AckedDeliverySpec
Merge pull request #108 from Aaronontheweb/remote-fixes

[UNSTABLE] RemoteEndpointRegistry, AckedDelivery