add order to ShopifyAPI::SmartCollection

lib/shopify_api/resources/smart_collection.rb

@@ -6,5 +6,8 @@ module ShopifyAPI
     def products
       Product.find(:all, :params => {:collection_id => self.id})
     end
+
+    def order(options={}); load_attributes_from_response(put(:order, options, only_id)); end
+
   end
 end