fix dc:type -> lastUriSegment ->edm:hasType rule
Strip ALL rdf:datatype but KEEP all rdf:lang, DM2E/dm2e-mappings#99
hard-code edm:type "TEXT", DM2E/dm2e-mappings#97
Sort ore:Aggregation according to ORE.xsd, fixes DM2E/dm2e-mappings#100