Use Mustache instead of underscore in gps timer

We had a line of code left from the underscore to Mustache switchover.
Initial (broken) work on templated login page

We used to have a login page mockup, this turns it into a templated
version with Backbone.
Merge branch 'features/login' of github.com:routemaster/routemaster-frontend into features/login

Conflicts:
	src/js/urlHandler.js