@gib => Added terms of use.

Lets us create content in `public/content/whatever.md` and route it explicitly in the app.

![screen shot 2014-08-27 at 2 13 23 pm](https://cloud.githubusercontent.com/assets/542335/4064898/dc0e31a6-2e15-11e4-9d1d-df5eb742bfec.png)

I like this pattern! Is `@content` `nil` if the file doesn't exist?