First run through of moving from Future[Unit] coming from merges to a Future[Option[OldValue]]
Add summer to tests, ws changes
Strip named producers from graph
Merge branch 'develop' of github.com:twitter/summingbird into feature/general_graph

Conflicts:
	summingbird-storm/src/main/scala/com/twitter/summingbird/storm/FinalFlatMapBolt.scala
More generic node interaction
Update tests
Add more storm option tests
Merge branch 'develop' of github.com:twitter/summingbird into feature/storm_option_tests
Improve test
Merge pull request #334 from twitter/feature/storm_option_tests

Adds/extends some storm option tests
Make VersionedState fail-safe
Merge pull request #337 from twitter/safer-restart

Make VersionedState fail-safe
Compiles first pass
throw before job submission
Pull the registrar handling code out into a separate module and try clean it up nicely
add test
Simplify the scalding env, make scalding env/platform configuration closer to storm
Merge pull request #338 from twitter/feature/throw_early

Throw on Storm Submission w/ no online store
Add some asserts, fix val not being valid, needs to be def
Bump scalding, and move back to having a test mode too :s janky.