add yarn-client support

add yarn-client support
update local.conf.template
Update to reference original Ooyala authorship and current status
update based on code review requirements
update based on code review requirements
allows passthrough of non spark specific settings directly to sparkConf
allows passthrough of non spark specific settings directly to sparkConf
Store a reference to named rdds
Merge pull request #29 from Ankit1010/namedrdd/prevent-rdd-gc

Store a reference to named rdds
Merge pull request #22 from CurryGaifan/yarn-client

add support for yarn-client mode
Added yarn-client to list of supported configs
Create 0.5.0 markdown notes
allows passthrough of non spark specific settings directly to sparkConf
clean up readme regarding passthrough
Merge pull request #28 from jeffsteinmetz/master

allows passthrough of non spark specific settings directly to sparkConf
Update notes
Added hint for Akka deadletters