First cut at OSGi-fun for slick.

* Add sbt-osgi plugin
* Create really really stupid defaults for slick OSGi bundle
* Create new project to run slick OSGi tests
  - We have to fork for who knows why
  - We pass bundles to load via a system property (may be windows unfriendly)
* Create the most basic of basic tests, just to ensure we load/link things in the OSGi world.