Code cleanups
Server automatically abort queries/commands after user-specified time limit (SCALA-118)
Removed erroneous toInt
Fix serverIsAtLeastVersion
You can't skip in setup
Removed scala 2.9.1 and 2.9.2 support

Casbah utilises `scala.concurrent.duration` which was added in scala 2.9.3
Updated nscala-time, specs2 and scalaTest