Reworked the graph construction tests a bit to deal with persisted graphs.
Make Neo4jGraph constructor compliant with graph construction tests.
Fix javadoc in graph construction tests.
Fix tests for persisted graphs like Neo4j.

Up to this point all tests have been based on a in-memory tinkergraph so adjustments were required to get tests working properly.
Improve Feature settings for neo4j.
Get more tests working for Neo4j.
Merge remote-tracking branch 'origin/master'