espeed/bulbs — pull request #62 by etabard (2012-08-23 18:04:41+00:00)
Title: Add property Document to store nested values

Sometimes it doesn't make sense to create a new node type if you have nested property values.
You just want to store it flat in database.

Eg:
```python
class User(Node):
element_type = "user"
id = String(default=VertexId)
settings = Document()

users = client.build_proxy(User)
userSettings = {'notifications' : {'mail' : True}}
a = users.create(settings = userSettings)
a.settings['notifications']
>>> {mail : True}