Add need ids to detailed guides

https://www.pivotaltracker.com/s/projects/1015742/stories/66065594

![image](https://cloud.githubusercontent.com/assets/23801/2851593/5e94cc62-d11d-11e3-9817-b60050e76bd8.png)

![image](https://cloud.githubusercontent.com/assets/23801/2819767/5e19cf08-cef2-11e3-9703-b9233b6ab076.png)