Merge branch 'master' into stageInfo

.gitignore

bagel/pom.xml

core/pom.xml

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/SparkContext.scala

core/src/main/scala/spark/api/java/JavaDoubleRDD.scala

core/src/main/scala/spark/api/java/JavaPairRDD.scala

core/src/main/scala/spark/api/java/JavaRDD.scala

core/src/main/scala/spark/api/java/JavaRDDLike.scala

core/src/main/scala/spark/api/java/JavaSparkContext.scala

.../src/main/scala/spark/api/java/PairFlatMapWorkaround.java

core/src/main/scala/spark/api/python/PythonRDD.scala

core/src/main/scala/spark/deploy/master/Master.scala

core/src/main/scala/spark/network/Connection.scala

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

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

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

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