Custom build of scala-swing for HLSW/Java7

The scala-swing project has 2 available configurations, none of which is compatible with HLSW.

The first is using  java 6 and scala 2.10 and the next is java 7 with scala 2.11. We need a version that uses java 7 and scala 2.10

This pull request updates the build file making it compatible with the planned java 7 release of the ocs