New styling for API docs

Cleaned up some styling and the API page is now full width.

#### MacBook Air
![screen shot 2013-08-15 at 5 08 42 pm](https://f.cloud.github.com/assets/370323/971842/0396c2c4-05ef-11e3-8544-66954411fc6d.png)
#### 27" Display
![screen shot 2013-08-15 at 5 09 10 pm](https://f.cloud.github.com/assets/370323/971843/039ba208-05ef-11e3-9286-9441c5cf6ce8.png)

@nickjs @SoapyIllusions