Add some benefits over other concepts like DS, BluePrint, ...

[lefou]

• Benefits over pure Java Activator
  ** Better code

• Benefits over DS, Blueprint ...
  ** when using pure DS/Blueprint:
  *** no XML writing
  ** when using Annotation-based DB/Blueprint:
  *** no usage specific annotations on usage un-specific classes
  ** No extra post-processing step needed, e.g. a bnd plugin that scans annotation and/or XML files
  ** Full support via IDE and Compiler
  ** Bnd will not miss imports
  ** Out-of-the-box lifecycle dynamics outside of OSGi Container, e.g. with Felix Connect (former PojoSR)
  ** Easy Unit-Testing of Activator functionality in standard unit tests
  ** Ideomatic Java and Scala notation, without Annotations