More work on standalone deploy system.

core/src/main/scala/spark/deploy/Command.scala

core/src/main/scala/spark/deploy/DeployMessage.scala

core/src/main/scala/spark/deploy/ExecutorState.scala

core/src/main/scala/spark/deploy/JobDescription.scala

core/src/main/scala/spark/deploy/client/Client.scala

core/src/main/scala/spark/deploy/client/ClientListener.scala

core/src/main/scala/spark/deploy/client/TestClient.scala

core/src/main/scala/spark/deploy/master/ExecutorInfo.scala

core/src/main/scala/spark/deploy/master/JobInfo.scala

core/src/main/scala/spark/deploy/master/JobState.scala

core/src/main/scala/spark/deploy/master/Master.scala

core/src/main/scala/spark/deploy/master/WorkerInfo.scala

core/src/main/scala/spark/deploy/worker/Worker.scala

core/src/main/scala/spark/util/AkkaUtils.scala