Add syntax highlighting to the example code

#### Before
![screen shot 2013-12-03 at 12 55 21 pm](https://f.cloud.github.com/assets/54056/1666278/47266444-5c44-11e3-9274-c4b56f0d5ea3.png)
#### After
![screen shot 2013-12-03 at 12 55 02 pm](https://f.cloud.github.com/assets/54056/1666277/471c65ac-5c44-11e3-8a97-04dd55aeff23.png)
#### Before
![screen shot 2013-12-03 at 12 55 40 pm](https://f.cloud.github.com/assets/54056/1666280/4727fbd8-5c44-11e3-946c-51965ee6351d.png)
#### After
![screen shot 2013-12-03 at 12 55 31 pm](https://f.cloud.github.com/assets/54056/1666279/47269572-5c44-11e3-9fb1-b3688ea288af.png)