Mobile Responsive Layouts - Inclusion of viewport and associated @media overrides

![IMG_0706](https://f.cloud.github.com/assets/77467/336773/02c87280-9cb2-11e2-87ac-3124b38d6ae9.PNG)
![IMG_0707](https://f.cloud.github.com/assets/77467/336774/02dceb98-9cb2-11e2-845f-8b9f1b039a72.PNG)