update getLowLevelCacheEntries to take the jcr:content node or jcr:data property, instead of the parent node.
yank a bunch of unused JAX-B models out of http-commons
replace fixity JAX-B response with RDF; move fixity work up to DatastreamService, and add a RDF serialization for fixity results.
clean up unused fixity resources
replace fedora identifiers JAX-B with RDF
Got 401 returning from protected resource. Now just have to find out how to log in...