Call removeJob instead of killing the cluster.
Handle Master telling the Worker to kill an already-dead executor.
Don't bother creating an exception.
Fix Worker logInfo about unknown executor.
Replace old 'master' term with 'driver'.
Merge branch 'master' into driver

Conflicts:
	core/src/main/scala/spark/SparkContext.scala
	core/src/main/scala/spark/SparkEnv.scala
	core/src/main/scala/spark/deploy/LocalSparkCluster.scala
	core/src/main/scala/spark/executor/StandaloneExecutorBackend.scala
	core/src/main/scala/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
	core/src/main/scala/spark/scheduler/cluster/StandaloneClusterMessage.scala
	core/src/main/scala/spark/scheduler/cluster/StandaloneSchedulerBackend.scala
	core/src/main/scala/spark/storage/BlockManagerMaster.scala
	core/src/main/scala/spark/storage/ThreadingTest.scala
	core/src/test/scala/spark/MapOutputTrackerSuite.scala
Add RDD.toDebugString.

Original idea by Nathan Kronenfeld.
Add JavaRDDLike.toDebugString().
Add number of splits.
Include name, if set, in RDD.toString().
Merge pull request #415 from stephenh/driver

Replace old 'master' term with 'driver'.
Merge pull request #425 from stephenh/toDebugString

Add RDD.toDebugString.
Merge remote-tracking branch 'stephenh/removefailedjob'

Conflicts:
	core/src/main/scala/spark/deploy/master/Master.scala
Remember ConnectionManagerId used to initiate SendingConnections.

This prevents ConnectionManager from getting confused if a machine
has multiple host names and the one getHostName() finds happens
not to be the one that was passed from, e.g., the BlockManagerMaster.
Use Mesos ExecutorIDs to hold SlaveIDs. Then we can safely use
the Mesos ExecutorID as a Spark ExecutorID.
Remove remants of attempt to use slaveId-executorId in MesosExecutorBackend
Include message and exitStatus if availalbe.
Merge pull request #429 from stephenh/includemessage

Include message and exitStatus if availalbe.
Merge pull request #428 from woggling/mesos-exec-id

Make ExecutorIDs include SlaveIDs when running Mesos
Merge pull request #426 from woggling/conn-manager-ips

Remember ConnectionManagerId used to initiate SendingConnections