Paymill/Paymill-PHP — pull request #16 by mrzard (2013-03-13 09:32:17+00:00)
Title: Look for reponse_code is its correct placement, add message if found

response_code was being looked for in
$response['body']['response_code']
instead of
$response['body']['data']['response_code']

Also, added the error explanation as consts in ```Services_Paymill_Apiclient_Interface``` so the error messages are more friendly for logging.