Added Ajax functionality to the sidebar without reloading the entire page.
Flashed the newly added cart item for visual confirmation
added helper and cleaned notice when empyting the cart
Made images clickable to add to cart
fixed tests
added AJAX tests
Merge branch 'phil/iteration_f5_clickable_pics'
added order scaffolding and styled the order form. Added association of line items to order
Added ability to place order/destroy old cart.
Added Atom feed who_bought products
Added mailers for shipped and received orders
added mailer tests
Added an integration test