Ontology: Neo: Removed eventId from Event and some other small changes
Ontology: Neo: Removed eventId from Event and some other small changes

Remove eventId from Event.
Change Manifestations and Interpretations to RDF-style enum.

hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker