Material beautify

Added icons to the navigation drawer, because they are awesome
Moved settings to the navigation drawer like in any google app
Status bar is now half transparent instad of fixed color, so looks better on navigation drawer open/close
Navigation bar is black, material guideline. [Ref](https://developer.android.com/training/material/theme.html)
> When you customize the navigation and status bars, either make them both transparent or modify only the status bar. The navigation bar should remain black in all other cases.

![device-2014-12-29-114017](https://cloud.githubusercontent.com/assets/7180398/5567951/a56c7220-8f4f-11e4-8728-fc67e5d46ad7.png)