update README
+checkouts model
+devise
install devise
make devise happy
add devise to users
change devise options on User
mobile first bros
login link working
move header and footer to their own partials
dont actually send any emails
condition the login / logout links in the header
remove devise comments
add admin field to users model
only show the add-edit locations path if user is an admin
markup and helmets
checkouts
move to before_filter for admin stuff
+devise views. ugh
fix typos