Merge pull request #746 from rxin/cleanup

core/src/main/scala/spark/Cache.scala

core/src/main/scala/spark/SoftReferenceCache.scala

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

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

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

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

...c/main/scala/spark/deploy/master/ui/ApplicationPage.scala

core/src/main/scala/spark/deploy/master/ui/IndexPage.scala

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

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

core/src/main/scala/spark/deploy/worker/ui/IndexPage.scala

...main/scala/spark/executor/StandaloneExecutorBackend.scala

...la/spark/scheduler/cluster/StandaloneClusterMessage.scala

.../spark/scheduler/cluster/StandaloneSchedulerBackend.scala

core/src/main/scala/spark/storage/BlockManagerMaster.scala

...rc/main/scala/spark/storage/BlockManagerMasterActor.scala

core/src/main/scala/spark/storage/BlockManagerMessages.scala

...src/main/scala/spark/storage/BlockManagerSlaveActor.scala

core/src/main/scala/spark/storage/BlockManagerSource.scala

core/src/main/scala/spark/storage/BlockMessage.scala