Add gremlin-server sessions (#2)
Add basic nashorn support
Add tests for client creation and querying

Update createClient() so it passes the tests
Add test for <=> operator with .localeCompare()
Give most methods more explicit names. Add comments.
Update tests to match classic tinkerpop graph
Update doc for nashorn engine and bound parameters
Bump to v0.1.0
Merge branch 'develop'