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.
@vandahm I found several good resources of using sass mixins for media queries.  Let me know if these examples were helpful and what direction you decide on.
http://web-design-weekly.com/2013/05/12/handy-sass-mixins/
https://divshot.com/blog/tips-and-tricks/useful-sass-mixins-for-responsive-design-font-sizing-and-more/
http://responsivedesign.is/develop/getting-started-with-sass