Landing page

With this PR, the Garage template now sets up a skeletal landing page with the ability to collect pre-launch waiting list subscribers.
using `/assets/` in the path causes an exception.
![action_controller__exception_caught](https://cloud.githubusercontent.com/assets/12001/4486095/1b21a2d0-49da-11e4-81a7-79d416344abe.png)