Remove duplicate documentation of options (which was out of date).
Remove vestigial hack.
Support scalding modules with --hdfs.
cascading and cascading-jdbc have different release cycles.
Merge pull request #789 from fs111/develop

cascading and cascading-jdbc have different release cycles.
Merge pull request #788 from ljrittle/module-support-with-hdfs-mode-in-scald.rb

Module support with hdfs mode in scald.rb
Merge branch 'develop' of https://github.com/twitter/scalding into develop