Merge pull request #462 from squito/stageInfo

core/src/main/scala/spark/BlockStoreShuffleFetcher.scala

core/src/main/scala/spark/ShuffleFetcher.scala

core/src/main/scala/spark/SparkContext.scala

core/src/main/scala/spark/TaskContext.scala

core/src/main/scala/spark/executor/Executor.scala

core/src/main/scala/spark/executor/TaskMetrics.scala

core/src/main/scala/spark/rdd/CoGroupedRDD.scala

core/src/main/scala/spark/rdd/ShuffledRDD.scala

core/src/main/scala/spark/rdd/SubtractedRDD.scala

core/src/main/scala/spark/scheduler/DAGScheduler.scala

core/src/main/scala/spark/scheduler/DAGSchedulerEvent.scala

core/src/main/scala/spark/scheduler/ResultTask.scala

core/src/main/scala/spark/scheduler/ShuffleMapTask.scala

core/src/main/scala/spark/scheduler/SparkListener.scala

core/src/main/scala/spark/scheduler/StageInfo.scala

core/src/main/scala/spark/scheduler/Task.scala

core/src/main/scala/spark/scheduler/TaskResult.scala

...rc/main/scala/spark/scheduler/TaskSchedulerListener.scala

core/src/main/scala/spark/scheduler/cluster/TaskInfo.scala

...c/main/scala/spark/scheduler/cluster/TaskSetManager.scala