Added Styles for single-case, Updated markup of single-case.php

Please review the updated styles and markup for single-case view. 

![screen shot 2013-11-17 at 2 14 53 pm](https://f.cloud.github.com/assets/792104/1557928/9ea0e854-4f4f-11e3-8115-f5c0c4204b1d.png)