Add popups for example of citation and file upload info.

#5821 

Output:
![selection_067](https://cloud.githubusercontent.com/assets/4497748/2654128/9b516234-bfcd-11e3-8b03-4200e9e86173.png)

Hover over left question mark:
![selection_066](https://cloud.githubusercontent.com/assets/4497748/2654133/b2535d8e-bfcd-11e3-85e0-892fe13ec4d3.png)

Hover over right question mark:
![selection_069](https://cloud.githubusercontent.com/assets/4497748/2654135/bfa61aee-bfcd-11e3-99b1-f1bbdb98ecbd.png)

Note: The publication example markup is missing and will be added later.