I'm trying to follow these docs:
<http://readthedocs.org/docs/neo4j-rest-client/en/latest/indices.html>
This works fine

```
from neo4jrestclient.client import GraphDatabase, Q
db = GraphDatabase("http://localhost:7474/db/data")
userIndex = db.nodes.indexes.get("index2")
print userIndex.query('username', "*")[:]

```

and according to the docs, this should also work, but doesn't.

```
print userIndex.query(Q('username', "*"))[:]

```

I upgraded to the latest version in the pip repository. Is this a bug?