Made cart-summary use actual data
Improved empty cart summary state
Merge branch 'develop' into feature/ec-47-login-template

Conflicts:
	app/jsx/components/_partials/cart-button.js
Refactored quantity related elements
Added user registration form
Added dummy image to cart-overview
Added checkout login/guest and address forms
Merge branch 'develop' into feature/ec-47-login-template
Merge commit '3f2bee31b8caf48a6ae52e675266d25847d3cb1f' into feature/ec-30-user-account