Add the 'nyucore' gem to the application. Get the latest from GitHub for the time being.
Add RDF vocabularies for NYU specific metadata elements and Dublin Core terms (since DC terms don't seem to be in the RDF gem). The vocabularies are dynamically built from the nyucore gem.
Add the nyucore RDF metadata description and a pending spec, since I don't yet know how to test datastreams.
Remove the rdf_types since we're now specifying the RDF vocabularies in the rdf directory.
Rename the Nyucore model to NyuCoreRdfResource and have it read from the nyucore gem for its metadata. Add a spec for the model.
CamelCase NyuCoreRdfMetadata
Change the name of the NyuCoreRdf model and its spec
Remove unused nyucore metadata datastream.
Update the nyucore model and datastream specs to point to the proper classes