a super push on Neo4jGraphStep and index lookups. Also, updated Neo4jGraphProvider to flip a coin to decide whether indices are created or not. This way, we can test legacy indices, cypher indices, and no indices. Lots more work to do on Neo4jGraphStep around index.query(), metaProperty indexing (need a LoadGraph.THE_CREW), and arbitrary Cypher indexing (and/or/etc.). Ref #93