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 slf4j logging to scalding
Merge branch 'develop' into add-more-logging

Conflicts:
	summingbird-scalding/src/main/scala/com/twitter/summingbird/scalding/ScaldingStore.scala
minor polish
Move the versioned store to scalding since its not tied to the builder API
Merge pull request #331 from twitter/add-more-logging

Add slf4j logging to scalding
Merge pull request #332 from twitter/feature/move_VersionedStore_to_scalding

Move the versioned store to scalding since its not tied to the builder A...
Stop storm digging in another logging platform
Travis log4j settings
Storm logging
Remove extra logging
Update travis script
Merge pull request #333 from twitter/feature/storm_logging2

Feature/storm logging2
Add more storm option tests
Merge branch 'develop' of github.com:twitter/summingbird into feature/storm_option_tests