Move Scala loading into scala_helper.rb
Slides: Add slides for Similarities, Differences and Tooling.
Package scala stuff as jar.
Make project a gem project.
Slides: Add Scuby code example.
Use jruby-scala-collections to simplify Scala code.
Take out Matz' quote. Add a little text on Scala -> JRuby.
Slides: A little re-phrasing
Slides: Rephrase some slides.
Slides: Tune last slides.
Use defined type in Scala.
Turn arguments around so they are identical in JRuby and Scala.
Dry specs.