UI
no message
UI fix app.js
UI commit
fix UI
all pictures
fix UI
fix UI
fix UI
Merge branch 'feature/dev-yvonne' into feature/dev-tang

Conflicts:
	app.js
	public/images/Chatting_Background.png
	public/js/main.js
	public/stylesheets/style.css
	views/index.jade
	views/layout.jade