gremlin-scala tinkerpop 2.0

Hi there,
I just ported gremlin-scala to the blueprints 2.0 stack. It's basically just adapted to the changed API, however I've added the order step for scala (see OrderStepTest). Tests are green.
https://github.com/mpollmeier/tinkubator/tree/gremlin-scala-tinkerpop2.0
Have a look if anything is missing ;)

Cheers
Michael