basic checkout
Including the lib folder to autoload path.
Namespacing checkout.
Removing old spec.
Inheriting for AR.
Moving item to AR.
pricing_rules accepts several variations of the same pattern "buy_X_get_X_free" via method_messing.
refactor
added bulk discount rule.
adding price rule for bulk discount
Aligning on =
using factories
subclassing discount rules
implementing respond_to? for the pricing rule subclasses.
Throwing in some contexts.
removed unused test dir & default README
added README