restructure remoting

- remove Remote, incorporate its few fields into RemoteActorRefProvider
- rename RemoteSupport to RemoteTransport to sync up with conf and
  the way we talk about it
- remove LocalAddress/RemoteAddress etc. and just have a final case
  class Address(protocol, system, host, port)
- split netty settings out or RemoteSettings into NettySettings
- split out from NettyRemoteSupport.scala: Server.scala, Client.scala,
  Settings.scala

plus a few fixes, including using the contextClassLoader when loading
the provider for ActorSystemImpl

akka-remote/src/test/scala/akka/remote/RemoteDeployerSpec.scala

@@ -41,7 +41,7 @@ class RemoteDeployerSpec extends AkkaSpec(RemoteDeployerSpec.deployerConf) {
           service,
           deployment.get.config,
           RoundRobinRouter(3),
-          RemoteScope(UnparsedSystemAddress(Some("sys"), UnparsedTransportAddress("akka", "wallace", 2552))))))
+          RemoteScope(Address("akka", "sys", Some("wallace"), Some(2552))))))
     }
 
   }