bootstrap v3 redesign for list overview page

updated list overview page to use bootstrap v3. added more boostrap hooks into the design (e.g., use of the responsive grid, bootstrap semantics, etc.). also cleaned up some of the css (e.g., removing unused/repetitive classes, applying more semantic class names, making font scaling more consistent, etc.). also added some font icons, and did some minor layout tweaks to the design. 

attaching a screenshot of the updated redesign.
![listoverview-updated](https://f.cloud.github.com/assets/1501884/1721470/69db5938-6223-11e3-90b6-34fb3221ff7e.png)