page 110
changed application.css to Sass, added new styling
added caching to store front and testing for new content
iteration C5
added cart model, and a new concern for setting the user's cart based on the session[:card_id] if one exists
added LineItem model, added relationships to cart and products. added before_destroy hook method to product model
added 'add to cart' button that creates a new LineItem for current session card_id
updated line_item create test parameter to product_id
added line items to the cart view
added a session[:counter] variable to count the amount of times a user views the store index page, then some funky stuff with how its displayed in the template. goody