Add navigation drawer to unify screens

Adds navigation drawer.

The ReportIce screen is just an empty layout, I just wanted to test the Navigator and NavDrawer selection states.

![nav](https://cloud.githubusercontent.com/assets/2678555/4218804/d5289ec8-38f4-11e4-9840-e5defcd968c7.png)

the app name is likely to change by the end of the week but for now...!