Serialize and restore spark.cleaner.ttl to savepoint
Renamed StandaloneX to CoarseGrainedX.

The previous names were confusing because the components weren't just
used in Standalone mode -- in fact, the scheduler used for Standalone
mode is called SparkDeploySchedulerBackend. So, the previous names
were misleading.
Added back fully qualified class name
Track and report write throughput for shuffle tasks.
Adding option to force sync to the filesystem
Trying new approach with writes
Perf benchmark
Minor cleanup
Making the timing block more narrow for the sync
Add new SBT target for dependency assembly
Add a comment and exclude tools
Upgrade Kafka 0.7.2 to Kafka 0.8.0-beta1 for Spark Streaming
SPARK-627 - reading --config argument
Merge branch 'master' of https://github.com/apache/incubator-spark

Updating local branch
Merge branch 'master' of https://github.com/apache/incubator-spark into sbt-assembly-deps
Unified daemon thread pools
Merge remote branch 'upstream/master' into rename
Fixed build error after merging in master
Make TaskContext's stageId publicly accessible.
Fix line length > 100 chars in SparkHadoopWriter