Smarter sleeps in the IO reactor specs
Threadsafer Cluster#start!/#shutdown!
Moved the fake IO reactor to its own file
Removed AsyncHelpers
Moved FakeServerHelpers to its own file
Better helpers for waiting for connections and disconnections
Rewrote the server helpers

OO FTW
Fixed an issue with the fake IO reactor and reconnections
Refactored the keyspace change detection in Cluster
Fixed thread safety issues in Cluster