There is no $this->redirectUrl, should be $this->getRedirectUrl()
Merge pull request #62 from maclof/master

Resolved an issue when trying to create a redirect response which uses POST data.
Fix Migs gateway tests
Randomize test card details to prevent hard coded tests
Add SecurePay Direct Post gateway
Add SecurePay callback URL
Add poser badges
-- add notify url to express checkout
Add notifyUrl tests
Fix tests
Merge branch 'master' of https://github.com/adrianmacneil/omnipay