Merge branch 'master' of https://github.com/mesos/spark into foldByKey

bagel/pom.xml

core/pom.xml

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

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

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

...src/main/scala/spark/scheduler/local/LocalScheduler.scala

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

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

.../main/scala/spark/storage/DelegateBlockFetchTracker.scala

core/src/test/scala/spark/scheduler/SparkListenerSuite.scala

examples/pom.xml

pom.xml

repl-bin/pom.xml

repl/pom.xml

streaming/pom.xml