Added additional dependencies:

- latest OSGi RS APIs;
- Felix DependencyManager for tracking dependencies.
Added APIs for processors and producers:

- needed in order to create the complete demonstrator chain;
- added boilerplate code in Result & Sample for equals, hashCode
  and toString.
Further implemented the stub implementations:

- make use of Felix DependencyManager for tracking dependencies;
- added all necessary code to get a local working version (use
  local.bndrun for this).