Resolving Issue #35 - Porting cassovary to Scala 2.10

This pull request resolves Issue #35  has the following changes
- Changed build.sbt to support previous version as well as 2.10; uses appropriate libraries according to ```scalaVersion``` 
- Changed Scala actors to Akka actors; as Akka-actors has been made default ahead of Scala-actors in version 2.10.
- Replaced net.lag.logging with twitter.util.logging
- Resolved other library dependencies for Scala 2.10