New Documents header

This is the start of the new documents header. Initial work by
<deathbearbrown@gmail.com> and Jenn Schiffer <jenn@pancaketheorem.com>.

Screenshot:
![](https://www.dropbox.com/s/fveopd7g937kgfz/Screenshot%202014-09-01%2016.43.57.png?dl=1)