Adding builds for Scala 2.9.2 and 2.10.1
Adding an SBT Wrapper.

Adding an SBT Wrapper to control which SBT Launcher we use, with this
you also don't require to install `sbt` to start working with the
project.
Fixing the ./sbt command to show the JAVA_HOME correctly
Updating sbt shell from latest at https://raw.github.com/paulp/sbt-extras/master/sbt
Merge pull request #176 from berngp/develop

Adding scala 2.9.3 and 2.10.1 for cross version build and an SBT wrapper.