Merge pull request #413 from rxin/scaladoc

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

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

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

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

...n/scala/org/apache/spark/deploy/worker/CommandUtils.scala

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

core/src/main/scala/org/apache/spark/rdd/PipedRDD.scala

...main/scala/org/apache/spark/scheduler/SparkListener.scala

...in/scala/org/apache/spark/storage/BlockObjectWriter.scala

...rc/main/scala/org/apache/spark/storage/StorageLevel.scala

...main/scala/org/apache/spark/util/CompletionIterator.scala

...rc/main/scala/org/apache/spark/util/MetadataCleaner.scala

project/SparkBuild.scala

...apache/spark/streaming/util/RateLimitedOutputStream.scala

...scala/org/apache/spark/streaming/util/RawTextSender.scala