Add dequeueAll to Queue
Merge pull request #386 from twitter/queueAll

Add dequeueAll to Queue
Merge branch 'develop' of github.com:twitter/summingbird into feature/generalize_storm_code

Conflicts:
	summingbird-online/src/main/scala/com/twitter/summingbird/online/Queue.scala
	summingbird-online/src/test/scala/com/twitter/summingbird/online/QueueLaws.scala
Use the Queue class for everything, scala ones are unreliable