Add need ids to detailed guides

https://www.pivotaltracker.com/s/projects/1015742/stories/66065594

![image](https://cloud.githubusercontent.com/assets/23801/2799434/a6abb9c4-cc5f-11e3-98dd-a524bdf35ebb.png)

![image](https://cloud.githubusercontent.com/assets/23801/2799435/ab07049c-cc5f-11e3-85c2-919a97f41240.png)