Add support for Jade

![jade-dark](https://f.cloud.github.com/assets/374925/2179805/6b362a3e-96d9-11e3-98cb-af4233c1a155.png)
![jade-light](https://f.cloud.github.com/assets/374925/2179806/6b38d6ee-96d9-11e3-9879-dc240e86118d.png)