Test commit karma for Spark git.
Merge remote-tracking branch 'old/master'
Merge pull request #801 from pwendell/print-launch-command

Print launch command [Branch 0.8 version]
Merge remote-tracking branch 'origin/master' into branch-0.8
Merge remote-tracking branch 'origin/master' into branch-0.8
Merge remote-tracking branch 'origin/master' into branch-0.8
Merge remote-tracking branch 'origin/master' into branch-0.8
PySpark: implementing subtractByKey(), subtract() and keyBy()
Don't send SIGINT to Py4J gateway subprocess.

This addresses SPARK-885, a usability issue where PySpark's
Java gateway process would be killed if the user hit ctrl-c.

Note that SIGINT still won't cancel the running s

This fix is based on http://stackoverflow.com/questions/5045771
RDD sample() and takeSample() prototypes for PySpark
Change docs color theme for 0.8
New hardware provisioning doc, and updates to menus
Make HadoopRDD's configuration accessible
Also add getConf to NewHadoopRDD
Merge pull request #876 from mbautin/master_hadoop_rdd_conf

Make HadoopRDD's configuration accessible
More doc improvements + better warnings when you haven't built Spark
Link the Spark UI to the Yarn UI
fix up minor things
Update docs about HDFS versions
Merge pull request #869 from AndreSchumacher/subtract

PySpark: implementing subtractByKey(), subtract() and keyBy()