This contribution will remove oscommerce images from header for
shopping cart/my account and replace them with a nicer shopping cart,
number of items in cart and total amount.
Plus, when the customer's cart is empty, it will show an empty
shopping cart, when the customer adds any item to their cart,
the shopping cart will appear to have items in it. If the customer
removes all items from their cart, the cart image will go back to
appearing empty.