Updating gradle to 1.5 and scala to 2.10.1

There is still a lot more work to do to convert from scala-actors to Akka but I thought this was an appropriate point to demonstrate the initial changes and start a dialog as to whether this was a welcome pull request or not.  Let me know and I will push forward.

I'm using http://docs.scala-lang.org/overviews/core/actors-migration-guide.html as a reference and this is mainly an exercise to gain familiarity with the codebase.  The only real material changes to this point are the updates to the build file, renaming a variable from 'default' to 'defaultProperty' for mysterious reasons (I think default might be a reserved keyword now?) and changing calls from expect to expectResult in the test suite.