Start a FAQ page

* Add a HighVoltage page at `/faq`

Minor:
* Move styles for anchor tags from `_base` into the more specific `_header` where it used

https://trello.com/c/h9zfaC9l/386-add-an-faq

![image](https://cloud.githubusercontent.com/assets/913757/4729268/98eab5d2-5982-11e4-8848-b144066c5b6b.png)

HighVoltage routes pages as `example.com/pages/name_of_page` by default. This bumps the URL up a level and removes `pages` so we can use `/faq`.

Is this worth commenting? `route_drawer` is not clear at all.