- first pass at vertex wrapper
 - initial pass at EdgeWrapper
 - updated addVertex, getVertex and removeVertex
 - added tests for addVertex, getVertex and removeVertex
 - added unwrap support to toJSON
 - added all properties support to getProperties
 - added toArray support
 - added jsify helper to aid in coercing data back to JS types when using next and toArray
 - removed toJSON usage from tests to lessen the dependency on it
 - added setProperty / getProperty tests
 - moved javify / jsify calls to core gremlin
 - added getProperties and setProperties tests