mesos/spark — pull request #892 by jey (2013-09-04 18:57:00+00:00)
Title: Fix yarn assembly

As of 666d93c, the `sbt/sbt yarn/assembly` target no longer works. This patch reverts those changes and adds additional documentation to clarify the YARN example.

This was originally reported in [this post](https://groups.google.com/d/msg/spark-users/WuG7z-voOT0/KaxYFZoW_FwJ).