adding code in carts_controller to catch error on invalid cart
adding code in combine_items_in_cart.rb after recreating database and then succesful migrate
added button to carts view
changed carts_controller.rb to make sure user deletes their own cart
updated carts_controller_test.rb to reflect changes to carts controller
fixed syntax errors in carts_controller.rb
removed flash notification from line_item_controller.rb
added price calculation to cart view
added total_price method to line_item.rb
added total_price method to cart.rb
added styling changes to depot.css
corrected syntax error in carts view
changed http://... to http://.... in layout. roject implments basic functionality of chapters 6-10. will add additional functionality indicated at the end of each chapter in future