OSGi bundle changes. 

Move classes to avoid package namespace overlap with Spray bundles.  Add sbt-osgi plugin changes.  Tested with both straight sockets and TLS, though there seems to be some missing configuration for the scalatests and TLS.

I have not tuned the bundle imports and exports, will do so after getting some example code running.  

Please let me know if there are any considerations that I may not have understood in the organization of the project.  I'm happy to re-spin this as necessary.