Issue #2223171 by rszrama: include an option to display a message for free orders when no payment methods are displayed in the checkout form.
Issue #2023491 by roderik: ensure error classes are set on form elements generating errors on checkout forms.
Issue #2096361 by bendiy: change the product match function from using a db_select() to an EntityFieldQuery with a related query alter.
Issue #1095814 by dpolant: revisit line item order_id setting issues by directly saving line items via commerce_line_item_save() when an order form is submitted instead of using the entity metadata wrapper's save function.
Issue #1803516 by joelpittet: fix a typo in the cart block view function.
Information disclosure fix by klausi: clean usernames of e-mail address host names when they are created using the mail_username token as with the default anonymous checkout completion rule.