App updated as per Expressjs 4

Hi,

Update the app to be compatible as per Expressjs 4. And also update the UI and made it like 

![screen shot 2014-05-05 at 1 05 57 pm](https://cloud.githubusercontent.com/assets/2562992/2876977/ee0bca32-d440-11e3-9030-ee13d47fe1f1.png)

Thanks,
Arvind.