Glokka should not create actor (same as Erlang's global)
Glokka can use given actor system
Add tests for LocalActorRegistry
Add test "Unregister dead actor"
Merge LocalActorRegistry to ActorRegistry
Add prefix to avoid actor name conflict
You can start multiple registry actors. They must have different proxyName.
context.system.actorOf vs context.actorOf
Release Glokka 1.1