Merge branch 'documented_relativeDiscount_and_fixedDiscount_behaviour'
changed order row price specification to use setAmountExVat and setVatPercent in creditorderrows_card example
moved creditCardOrder using setRowsToCredit and addNumberedOrderRows to file creditorderrows_with_rows.php
updated documentation on WebPayAdmin::creditOrderRow, as well as documentation on using WebPay::deliverOrder with order rows to partially deliver and/or credit an order
merge