activator-akka-cassandra

Fix nasty timing-dependent Heisenbug in TweetActorsPerformanceSpec by replacing table DROP and re-CREATE by the TRUNCATE CQL command

Replace RoundRobinRouter with RoundRobinPool, Add scaleFactor to simplify adapting to slower machines

Replace RoundRobinRouter with RoundRobinPool

Refactor List[Tweet] to Vector[Tweet], Remove unused imports

Refactor runAllClq to runAllCql, Invoke close instead of shutdown on session