added indataset to all entities; added identifiers.org entry; fixed default xref
added indataset to all entities; added identifiers.org entry; fixed default xref

hansmeets/bio2rdf-scripts,hansmeets/bio2rdf-scripts,hansmeets/bio2rdf-scripts,hansmeets/bio2rdf-scripts,hansmeets/bio2rdf-scripts,hansmeets/bio2rdf-scripts,hansmeets/bio2rdf-scripts