JCR-3534 - applied patch which adds ReferenceBinary API and implementation

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/trunk@1480574 13f79535-47bb-0310-9956-ffa450edef68
JCR-3534 - avoiding backward compatibility issue by adding back constructor DataIdentifier(byte[])

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/trunk@1480921 13f79535-47bb-0310-9956-ffa450edef68
wip