Suggested small changes to Java code for slightly more standard style, encapsulation and in some cases performance
Fix handling of empty SPARK_EXAMPLES_JAR
Add a script to download sbt if not present on the system
Pass commands down to system sbt as well
Switch from sbt to ./sbt in the README file
Spelling
Make sbt in the sbt directory
And update docs to match
reindent
Code review feedback
Fix indentatation
Finish documentation changes
CR feedback (sbt -> sbt/sbt and correct JAR path in script) :)
SPARK-1005 Ning upgrade
Made java options to be applied during tests so that they become self explanatory.
Add warning to null setJars check
Merge remote-tracking branch 'upstream/master'
Clarify spark.cores.max

It controls the count of cores across the cluster, not on a per-machine basis.
Change protobuf version for yarn alpha back to 2.4.1
Merge pull request #330 from tgravescs/fix_addjars_null_handling

Fix handling of empty SPARK_EXAMPLES_JAR

Currently if SPARK_EXAMPLES_JAR is left unset you get a null pointer exception when running the examples (atleast on spark on yarn).  The null now gets turned into a string of "null" when its put into the SparkConf so addJar no longer properly ignores it. This fixes that so that it can be left unset.