Better cypher support.

Start a traversal with cypher and drop it right to a Traversal.
Added ProcessStandardSuite framework for MatchStep
Merge branch 'master' of github.com:tinkerpop/tinkerpop3
fixed a bug in Neo4jGraph.of() and updated some docs.
added AGPL LICENSE.txt to neo4j-gremlin/ package per @jimwebber comments on Twitter. Minor tweaks to docs.
documentation tweak.