Feature: Integrate navigation drawer

Updated the app to use the navigation drawer for primary navigation:

![portrait_collapsed](https://f.cloud.github.com/assets/914968/2249359/0ee367b8-9d84-11e3-97a5-09e14a78f8ff.png)
![portrait_expanded](https://f.cloud.github.com/assets/914968/2249361/1135bdfe-9d84-11e3-8cff-9d8d1750a6d3.png)
![landscape_collapsed](https://f.cloud.github.com/assets/914968/2249363/14160506-9d84-11e3-8f09-ebcf56780753.png)
![landscape_expanded](https://f.cloud.github.com/assets/914968/2249365/163cb71c-9d84-11e3-873e-0196d39626e5.png)