Merge branch 'master' into dev

bagel/src/main/scala/spark/bagel/Bagel.scala

...la/spark/bagel/examples/WikipediaPageRankStandalone.scala

core/src/main/scala/spark/PairRDDFunctions.scala

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

core/src/main/scala/spark/RDD.scala

core/src/main/scala/spark/Utils.scala

core/src/main/scala/spark/broadcast/Broadcast.scala

core/src/main/scala/spark/broadcast/BroadcastFactory.scala

core/src/main/scala/spark/broadcast/HttpBroadcast.scala

core/src/test/scala/spark/BroadcastSuite.scala

core/src/test/scala/spark/PartitioningSuite.scala

ec2/README

ec2/deploy.generic/root/mesos-ec2/ec2-variables.sh

ec2/spark-ec2

ec2/spark_ec2.py

ec2/third_party/boto-2.4.1.zip

project/SparkBuild.scala

repl/src/main/scala/spark/repl/SparkILoop.scala