- ServerResource#doCatch() method wasn't invoking StatusService to set the error
        representation if empty.
      - Renamed StatusService methods from getRepresentation(...) and getStatus(...) to
        toRepresentation(...) and toStatus(...).
      - Added org.restlet.resource.@Status annotation type to automatically convert
        Throwable Java classes between HTTP statuses and error response entities.
        NOTE: implementation is still pending.