Updates to support LDP changes upstream
Merge pull request #56 from fcrepo4/ldp-resources

Updates to support LDP changes upstream

Related to: https://www.pivotaltracker.com/story/show/79973150
Update dc:subject examples to use literals instead of URIs as values

- Use CND file to specify namespace instead of (now-removed) fcr:nodeyptes rest api

Resolves: https://www.pivotaltracker.com/story/show/80564302
Adding RDF serializer, refactoring JCR/XML serializer
Wiring up RDF persistence in webapp
Adding RDF language enum, changing all @date to @since
Using URI class instead of strings for URIs
Merge pull request #58 from fcrepo4/rdf-serializer

Adding RDF serializer module
Handle datastream updates correctly

- RdfRetriever uses HEAD to find descriptions of non-RDF resources
- Update dependencies so fcrepo-http-commons is test-scoped and required modules are explicitly included
- Add inject dependency for Elasticsearch build

Resolves: https://www.pivotaltracker.com/story/show/81198770
Use org.fcrepo.jms. as a header prefix rather than http://fedora.info/definitions/v4/repository#

Partial resolution of: https://www.pivotaltracker.com/story/show/81285766