Grouped code by functionality.
 Changes to be committed:
	modified:   public/index.html
	renamed:    public/js/directives/login/login.html -> public/js/login/login.html
	renamed:    public/js/directives/login/login.js -> public/js/login/login.js
	renamed:    public/js/directives/nav/nav.html -> public/js/nav/nav.html
	renamed:    public/js/directives/nav/nav.js -> public/js/nav/nav.js
	new file:   public/js/questions/question.js
	new file:   public/js/register/register.js
	modified:   public/js/sos.js