UI Updates for Storage

- Added style for app-header (this includes the global action button) when clicked it needs to display a modal.
- Added the styles for toolbar, including folder navigation and the toolbar actions icons.
- Added some styles for responsive views.

![screen shot 2014-10-15 at 13 39 09](https://cloud.githubusercontent.com/assets/845767/4650289/3318dec2-5492-11e4-8026-3917065c3da1.png)
I meant this