renamed attrs to options, renamed collect_invoice method to clearly reflect the purpose, added some comments
renamed attrs to options, renamed collect_invoice method to clearly reflect the purpose, added some comments

rdougan/adyen,viniciusnz/adyen,mvz/adyen,rdougan/adyen,prognostikos/adyen,mvz/adyen,trekdemo/adyen,viniciusnz/adyen,upmysport/adyen,viniciusnz/adyen,prognostikos/adyen,mvz/adyen,surfdome/adyen,prognostikos/adyen,modyo/adyen,trekdemo/adyen,trekdemo/adyen,rdougan/adyen