Merge pull request #452 from stephenh/misc

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

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

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

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

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

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

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

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

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

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

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

.../src/main/scala/spark/rdd/MapPartitionsWithSplitRDD.scala

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

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

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

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