mw.data.representation should allow for generic class annotations

[amedranogil]

Currently the only property annotations supported by data representation are rdfs:comment and rdfs:label.

Annotations should be generalised to be able to use other properties, these methods may remain for backwards compatibility.

[amedranogil]

Work arround:

 oci_class.getInfo().setProperty(<annotationProperty>, <annotationValue>);