Environment now actually runs RunShutdownable actors

phases.go

@@ -215,7 +215,10 @@ func (this *environment) phase70Running() bool {
 		actors, done := this.actors.RBorrow()
 		defer done()
 		for _, actor := range actors.runnable.all() {
-			this.start(actor)
+			this.start(actor.(Actor))
+		}
+		for _, actor := range actors.runShutdownable.all() {
+			this.start(actor.(Actor))
 		}
 		
 	}()