Final Design

Will email details see http://spaceadvocates.rhettforbes.com/ for a live
preview.
Nav, Donate, Social Links, About

Tweaked Nav to fit more items, made donate a nav item, added social
links, tweaked the about page.
Pulled in design branch by Rhett
Moved spens sass library to ruby gem and switched to sticky footer
Moved the Foundation file
Cleaned up design branch
Merge branch 'design'