make remote supervision and path continuation work

- add supervisor to remote USE message
- make remoteDaemon a VirtualPathContainer like
  LocalActorRefProvider.tempContainer (i.e. synchonous with CHM-based
  child lookup), scrap remoteDaemonSupervisor and rename remoteDaemon to
  “/remote” to match the plans in the docs
- comment out the remote deployment configuration section, to be done
  when Henrik is finished with RoutedActorRef work
- for now only “remote.nodes = ["sys@host:port"]” is looked at, i.e. if
  at least one is present, the first one is used to determine where to
  deploy the currently created child (routers will do the scaling-out
  component) [rest is commented out]
- multi-jvm tests not yet re-enabled (need to be adapted), but all other
  tests are GREEN (at least on my machine)

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

@@ -7,6 +7,10 @@ import akka.testkit._
 import akka.actor._
 import com.typesafe.config._
 
+object RemoteCommunicationSpec {
+  val echo = Props(ctx ⇒ { case x ⇒ ctx.sender ! x })
+}
+
 class RemoteCommunicationSpec extends AkkaSpec("""
 akka {
   actor.provider = "akka.remote.RemoteActorRefProvider"
@@ -16,9 +20,16 @@ akka {
     hostname = localhost
     port = 12345
   }
+  actor.deployment {
+    /user/blub {
+      remote.nodes = ["remote_sys@localhost:12346"]
+    }
+  }
 }
 """) with ImplicitSender {
 
+  import RemoteCommunicationSpec._
+
   val conf = ConfigFactory.parseString("akka.remote.server.port=12346").withFallback(system.settings.config)
   val other = ActorSystem("remote_sys", conf)
 
@@ -67,6 +78,13 @@ akka {
       }(other)
     }
 
+    "create children on remote node" in {
+      val r = system.actorOf(echo, "blub")
+      r.path.toString must be === "akka://remote_sys@localhost:12346/remote/RemoteCommunicationSpec@localhost:12345/user/blub"
+      r ! 42
+      expectMsg(42)
+    }
+
   }
 
 }