Access to Property View for Information on Skills

The *properties view* in Eclipse is one of the standard views. It would be great to have access to the property view to display specific informations when skills in a skill graph are selected.

I already started with the implementation in a new package, but failed to correctly update the properties view.

__Package:__

__Plugin.xml (extension points):__

__Problem (Camara selected):__

# Properties to display:
- Name
- Type
- Precondition (Assume)/Postcondition (Safety)