Show user-defined job name in UI
adding matrix factorization data generator
Simple PageRank algorithm implementation in Java for SPARK-760
Updated code with reviewer's suggestions
[HOTFIX] Extend thread safety for SparkEnv.get()

A ThreadLocal SparkEnv.env is facing various situations leading to
NullPointerExceptions, where SparkEnv.env set in one thread is not
gettable in another thread, but often assumed to be available.

See, e.g., https://groups.google.com/forum/#!topic/spark-developers/GLx8yunSj0A

This hotfixes SparkEnv.env to return either (a) the ThreadLocal
value if non-null, or (b) the previously set value in any thread.

This approach preserves SparkEnv.set() thread safety needed by
RDD.compute() and possibly other places. A refactoring that
parameterizes SparkEnv should be addressed subsequently.

On branch adatao-global-SparkEnv
Changes to be committed:

	modified:   core/src/main/scala/spark/SparkEnv.scala
SPARK-850: Give better error message on the console
fixing formatting
SPARK-850: give better console message
Merge branch 'master' of github.com:cybermaster/spark
JBoss repository working now
Merge pull request #780 from cybermaster/master

SPARK-850
Only reduce the number of cores once when removing an executor
Timeout zombie workers
milliseconds -> seconds in timeOutDeadWorkers logging
Moved handling of timed out workers within the Master actor
[HOTFIX] Mark lastSetSparkEnv @volatile in case it gets HotSpot-cached

On branch adatao-global-SparkEnv
Changes to be committed:

	modified:   core/src/main/scala/spark/SparkEnv.scala
Merge pull request #774 from pwendell/job-description

Show user-defined job name in UI
fixing formatting, style, and input
Merge pull request #776 from gingsmith/master

adding matrix factorization data generator
SHARK-94 Log the files computed by HadoopRDD and NewHadoopRDD