#72 add refunded amount to adyen_order_payment table, fix multiple refunds on same pspreference for split payments, show split payments in overview payment information of the order and add column original_reference to notification table.

Fixes #35 add aditionalValidators to payment method adyen_hpp and adyen_sepa (other payment mehthods already have this) so terms of condition is validated if it is set to manually

#561 OneCLick fix for alternative payment methods and guest checkout and option to set the sepa flow default is sale

added logo for adyen POS and not using a transparent gif to generate the size but just a class with a css widht height definition with a sprite img background