Tweak - Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method Pronamic_Jigoshop_IDeal_AddOn::payment_gateways() should not be called statically.
Tweak - Deprecated: Assigning the return value of new by reference is deprecated in classes/Pronamic/Jigoshop/IDeal/IDealGateway.php on line 153.

Tweak - Deprecated: Assigning the return value of new by reference is deprecated in classes/Pronamic/Jigoshop/IDeal/IDealGateway.php on line 172.
Removed key, was causing ‚undefined’ issue in Jigoshop.
Update change log.