Added version of API
format change of previous update
same as previous
Updated result codes

Added 96 and 99
Added descriptions to result codes 96-99
Updated description of submitPaymentReceipt
Moved submitPaymentReceipt to mandatory request

For both POS and Webshop. Also added refundPayment under "extended
integration" for those payments.
Same as previos for Appshop and Services
Merge branch 'develop'