Add scaffolding for a Cart to contain the client's order.
Add scaffolding for a LineItem to be placed within contain the client's cart and referenced to a product.
Update Cart and Product models to link to LineItems model
Add 'Add to cart' button to each line item on the store's catalog page
Update LineItem Controller to add items to cart on Add Item button click
Add test case to LineItems Controller to check LineItem addition to Cart
Update cart show template to display LineItems stored in the Cart
Added click to add LineItem to each product's image on catalog page
Added session view counter and error display message to Catalog Index Page