- compat: 

  * Add javadoc; export the compat package using version 2.0.2; import new dm api using version range [3.0.0, 4.0.0)
  * add suport for ServiceComponent/ServiceComponentDependency classes (but it's only used by the old dm shell).

- test: 

  * add test for compatibility library

- annotation:

  * resource dependency: allow to specify an URL instead of the filter. Fix javadoc