Moves to 2.10.x as the default and to scalatest

FYI for anyone else who sees this: http://www.artima.com/docs-scalatest-2.2.0-RC1/index.html#org.scalatest.DiagrammedAssertions

Those look very slick. I'll swap all these shouldEqual over to asserts to get the base info. Looks like we can flick those on in future for more info