Chef deploy for job server

-Reverting to spark 0.9.1
-Build debian package for spark-jobserver.jar.  This gets used by the chef recipes for deployment

Not sure if spark 0.9.1 is the right version, or if it's 0.9.3
I guess we could require the user to specify the maintainer email in an environment variable or a config file.  Seems weird to go to that trouble just for one field, but I can definitely see why that would make sense.  Ideally we wouldn't want any Ooyala-specific logic in here - even though this fork has been repurposed to be a de facto private repo, others may not view it as such.