Will's changes

Updated app.scss, _settings.scss, and index.html. Format all pages based
off the changes I made on index.html. I mean, I'm not fully confident
with my foundation skills, but I think this is better then what we had
before.
nav update

updated the header nav a bit. this is just a temporary solution for
mobile navigation. we need to come up with something better. it doesn't
look very good at the moment.