Merge remote-tracking branch 'upstream/master' into sparsesvd

bagel/src/test/scala/org/apache/spark/bagel/BagelSuite.scala

bin/compute-classpath.sh

core/src/main/scala/org/apache/spark/Accumulators.scala

core/src/main/scala/org/apache/spark/Aggregator.scala

core/src/main/scala/org/apache/spark/CacheManager.scala

core/src/main/scala/org/apache/spark/FutureAction.scala

core/src/main/scala/org/apache/spark/HttpFileServer.scala

...c/main/scala/org/apache/spark/InterruptibleIterator.scala

core/src/main/scala/org/apache/spark/Logging.scala

core/src/main/scala/org/apache/spark/MapOutputTracker.scala

core/src/main/scala/org/apache/spark/Partitioner.scala

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

core/src/main/scala/org/apache/spark/SparkEnv.scala

core/src/main/scala/org/apache/spark/SparkHadoopWriter.scala

...rc/main/scala/org/apache/spark/api/python/PythonRDD.scala

...src/main/scala/org/apache/spark/broadcast/Broadcast.scala

...n/scala/org/apache/spark/broadcast/BroadcastFactory.scala

...main/scala/org/apache/spark/broadcast/HttpBroadcast.scala

...n/scala/org/apache/spark/broadcast/TorrentBroadcast.scala

core/src/main/scala/org/apache/spark/deploy/Client.scala