Issue #21: Remove RDF module from core.
Issue #21: Remove RDF module. Merging with HEAD.
Merge remote-tracking branch 'backdrop/1.x' into jenlampton-remove-rdf
Issue #21: Remove RDF module. Fixing tests.
Issue #21: Removing RDF module. Merging conflicts.
Merge pull request #80 from quicksketch/jenlampton-remove-rdf

Issue #21: Remove RDF module from core.