generated scaffold for orders
added association to line_item (1 order : many line_items)
added Checkout button to cart redirecting to Order.new
Order.create copies items from current cart and deletes it
added basic validation to order
adjusted order form partial to use select box, added fieldlist
  with legend to the enclosing new view
adjusted specs accordlingly
added fixtures
added test for LineItem.create via ajax (needed render_views to work)
notice gets hidden when item is added to cart
fixed comments in javascript
added some RSpec configuration