Joins not working for dot syntax / nested objects
![image](https://cloud.githubusercontent.com/assets/987654/24760729/8270a71e-1ab7-11e7-9a56-2243e8bd55a6.png)

![image](https://cloud.githubusercontent.com/assets/987654/24760737/86d17c2a-1ab7-11e7-982c-dca98931611f.png)

```
"location": {
      "id": 5,
      "name": "87 Summer St",
      ...
},
"level": {
      "id": 3,
      "location_id": 5,
      "name": "Floor 20"
}
```