Add support for neo4j indexes and unique constraints.
Labeled and legacy indexes are support.
Merge remote-tracking branch 'pietermartin/master' into neo4jindices
Removed default settings for auto-indexing from Neo4j implementation.
Merge remote-tracking branch 'origin/master' into neo4jindices
Legacy indices have proper configuration in tests.
Add means to get Neo4j Schema object from Graph.
Remove indexing methods from Neo4jGraph. #25

All indexing will be performed by the native API.  Adjusted tests to use the native API instead of the removed methods.  Removed a test or two related to just testing the "helper" methods on Neo4jGraph.
Merge remote-tracking branch 'origin/master' into neo4jindices