Remove root version from triples
Fix version view error
Update POM developers section

Resolves: https://github.com/fcrepo4/fcrepo4/pull/581
Add logback-classic to fcrepo-kernel test dependencies
add FedoraJcrTypes.FEDORA_BLANKNODE constant and a predicate to check for it
Extract PropertyValueIterator from PropertyToTriple for iterating over some number of Properties' values
Embed blank nodes in responses that reference them
Switch order of RdfStream to make the previous pass.