added bootstrap, jquery, images are ok on home page, login is in progress
Merge branch 'front_end' of https://github.com/Empters/HealthPriority into front_end

Conflicts:
	app/assets/stylesheets/styles.css.erb
	app/views/home/index.html.erb
	app/views/layouts/application.html.erb
fix conflicts
set confirmable to the user, now it sends mails