slimmed OWL files should get provenance details

[egonw]

This includes:

• version it was derived from
• date
• Jenkins job(?) or just "eNanoMapper"
• ...

[egonw]

original OWL file should use owl:priorVersion... just need to get it out...

// prior version
owlAnnotationProperty =
  dataFac.getOWLAnnotationProperty(OWLRDFVocabulary.OWL_PRIOR_VERSION.getIRI());
anno = dataFac.getOWLAnnotation(owlAnnotationProperty, oldVersion);
man.applyChange(new AddOntologyAnnotation(onto, anno));