Added encrypted cvc support for one-click payments
Add a additional_data attr to AuthorisationResponse

Customers might require adyen support to enable this feature where their
api return the credit card last 4 digits when doing an authorization.
Should come in handy when using client side encryption and you never
have a chance to grab the cc last 4 digits
Add Adyen::Form#payment_methods_url helper
Merge pull request #86 from huoxito/additional-data-response

Add a additional_data attr to AuthorisationResponse
Merge pull request #77 from huoxito/payment-methods-list-helper

Add Adyen::Form#payment_methods_url helper
Changed and to &&
Updated README with links to integration manuals
Merge pull request #84 from printic/master

One-click payment CVCs can now be passed as an encrypted payload
Clean up indentation
Merge pull request #88 from wvanbergen/indentation_cleanup

Clean up indentation
Bump version to 1.5.0
[API] Update CA root certificates file.
Convert Adyen module specs to Minitest unit tests.
Convert Adyen::Form specs to Minitest unit tests.
Merge pull request #89 from wvanbergen/minitest

Migrate to Minitest for testing
Assert that the initial authorisation succeeded in functional api_spec
Use different webservice account which allows non-encrypted API calls.
Enable some API specs now we have a working account.
Recurring API calls now work as well
Add note about the CI test account to the README