Issue #1147678 by rbayliss, rszrama: add a Rules action to display the default translatable Add to Cart message and define a default rule to display it after a product is added to the cart.

Issue #1292690 by paul.linney, rszrama: use an autocomplete textfield by product SKU to add products to orders instead of the one giant select list.

Issue #823466 by aidanlis, rszrama: add a Rules action to add a product to a user's cart by product SKU.

Issue #1128176 by Flowster: add an action to empty a cart order (i.e. remove all products from an order).

#1001540 by rszrama: move shopping cart order status resetting to a default rule based on when products are added to or removed from the cart; also added a condition to check if an order is a shopping cart.

Add API functions for removing items from the cart and updating the cart form accordingly. Also, tried a different approach for #979846 by removing the definition of the line_items field in the order property info array.

#997130 by rszrama: add events when preparing to add and after adding products to the shopping cart.