Modifications to make sure LocalScheduler terminate cleanly without errors when SparkContext is shutdown, to minimize spurious exception during master failure tests.

Conflicts:
	core/src/main/scala/spark/ParallelCollection.scala
	core/src/main/scala/spark/RDD.scala
	core/src/main/scala/spark/rdd/BlockRDD.scala
	core/src/main/scala/spark/rdd/CartesianRDD.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
	core/src/main/scala/spark/rdd/MapPartitionsWithSplitRDD.scala
	core/src/main/scala/spark/rdd/MappedRDD.scala
	core/src/main/scala/spark/rdd/PipedRDD.scala
	core/src/main/scala/spark/rdd/SampledRDD.scala
	core/src/main/scala/spark/rdd/ShuffledRDD.scala
	core/src/main/scala/spark/rdd/UnionRDD.scala
	core/src/main/scala/spark/scheduler/ResultTask.scala
	core/src/test/scala/spark/CheckpointSuite.scala

lookup() needn't fail when there is no partitioner

Allow distinct() to be called without parentheses

Kryo2 update against Spark master

Conflicts:
	core/src/main/scala/spark/MapOutputTracker.scala
	core/src/main/scala/spark/PairRDDFunctions.scala
	core/src/main/scala/spark/ParallelCollection.scala
	core/src/main/scala/spark/RDD.scala
	core/src/main/scala/spark/rdd/BlockRDD.scala
	core/src/main/scala/spark/rdd/CartesianRDD.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
	core/src/main/scala/spark/rdd/MapPartitionsWithSplitRDD.scala
	core/src/main/scala/spark/rdd/MappedRDD.scala
	core/src/main/scala/spark/rdd/PipedRDD.scala
	core/src/main/scala/spark/rdd/SampledRDD.scala
	core/src/main/scala/spark/rdd/ShuffledRDD.scala
	core/src/main/scala/spark/rdd/UnionRDD.scala
	core/src/main/scala/spark/storage/BlockManager.scala
	core/src/main/scala/spark/storage/BlockManagerId.scala
	core/src/main/scala/spark/storage/BlockManagerMaster.scala
	core/src/main/scala/spark/storage/StorageLevel.scala
	core/src/main/scala/spark/util/MetadataCleaner.scala
	core/src/main/scala/spark/util/TimeStampedHashMap.scala
	core/src/test/scala/spark/storage/BlockManagerSuite.scala
	run

Conflicts:
	core/src/main/scala/spark/ParallelCollection.scala
	core/src/test/scala/spark/CheckpointSuite.scala
	streaming/src/main/scala/spark/streaming/DStream.scala

Added the ability in block manager to remove blocks.

SPARK-616: Logging dead workers in Web UI.

excessive debug messages.

Tweaked debian packaging to be a bit more in line with debian standards

Fixed repl maven build

Fixed repl maven build to produce artifacts with the appropriate hadoop classifier and extracted repl fat-jar and debian packaging into a separate project to make Maven happy

This patch keeps track of which workers have died and marks them
as such in the master web UI. It also handles workers which die and
re-register using different actor ID's.

Add try-finally to handle MapOutputTracker timeouts

Have standalone cluster report exit codes to clients

Fixed the broken Java unit test from SPARK-635.

Executor exit status codes