make resources no longer mandatory to implement ContextRessource

[JensLautenbacher]

We should remove the need to implement a special interface for having objects that represent the model of the application. Using the Object-to-XML serializer we already have, we can simply use any object we want in the role of a ContextRessource?.

We should do it like this: for "real" ContextRessources?, call the insertStatus() method of them as we do now. For other objects, we serialize the object itself and implement this in StateUtil?.renderContextResources()

[JensLautenbacher]

Done. Implemented @InitResource? and @InsertStatus? annotations to designate methods from beans, if no @InsertStatus? is present, the whole bean will be serialized.