Using Archer font for docs pages.

This gives the docs a 'cleaner' look, IMO.

I realize this probably won't get accepted, but I figured it was worth a try. Here's some before / after pics to illustrate the differences:

![before](http://i.imgur.com/FewbzRo.png)

vs

![after](http://i.imgur.com/dyCHSEq.png)

![before](http://i.imgur.com/0qCb357.png)

vs

![after](http://i.imgur.com/rNlC8GS.png)