Add a Performance and CSS Analysis section to rizzo

![image](https://cloud.githubusercontent.com/assets/814861/3286485/b5725428-f549-11e3-901e-436ad4385eb2.png)

![image](https://cloud.githubusercontent.com/assets/814861/3286487/bd238c78-f549-11e3-9581-7bc9f777887d.png)