Updates set-versions to handle all scala-library ids

It now uses the style of scala library id which is referenced in the p2 repo
Merge pull request #12 from skyluc/issue/support-old-and-new-scala-library-ids

Updates set-versions to handle all scala-library ids
Prepare for 0.4.2 release
Sets to next development version
Adds support for Luna builds
Prepare for 0.4.3 release
Prepare for next dev cycle