yarn-client addJar fix and misc other
add application type
Update based on review comments
Make DEBUG-level logs consummable.

Removes two things that caused issues with the debug logs:

(a) Internal polling in the DAGScheduler was polluting the logs.
(b) The Scala REPL logs were really noisy.
Merge pull request #384 from pwendell/debug-logs

Make DEBUG-level logs consummable.

Removes two things that caused issues with the debug logs:

(a) Internal polling in the DAGScheduler was polluting the logs.
(b) The Scala REPL logs were really noisy.
Merge pull request #371 from tgravescs/yarn_client_addjar_misc_fixes

Yarn client addjar and misc fixes

Fix the addJar functionality in yarn-client mode, add support for the other options supported in yarn-standalone mode, set the application type on yarn in hadoop 2.X, add documentation, change heartbeat interval to be same code as the yarn-standalone so it doesn't take so long to get containers and exit.