ontology: Removed duplicate nfo:depicts and correct domain/range
ontology: Removed duplicate nfo:depicts and correct domain/range

Previously nfo:depicts was defined, but not nfo:depiction, because the spec
was in draft at the time.

The domain/range bug was a copy/paste error

All noticed on make distcheck

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