Deprecate credit method in net registry gateway
Merge pull request #702 from jduff/deprectate_credit_net_registry

Deprecate credit method in net registry gateway
Don't include customer_number unless it is numeric.
Don't include customer id unless it is numeric.
Accept numeric strings as well.
Epay: Deprecate credit method
Merge pull request #705 from Shopify/epay-deprecate-credit

Epay: Deprecate credit method
Add tests for excluding customer_number for non numeric values.
Merge pull request #703 from Shopify/sagepay-fix

Sage Payments: Don't include customer_number unless it is numeric.
Add tests for authnet cust_id fix.
Merge pull request #704 from Shopify/authnet-email-fix

Don't include customer id unless it is numeric.
Merge pull request #699 from cagerton/master

Updates to the Bluepay module
Add Payu_in as provided by them.
adding payu_in remote & unit tests
Payu_in: Major code cleanup to get the integration working properly.
Merge pull request #698 from Shopify/payu_in

Add Payu_In Integration
Auth.net: Don't directly check the source class.
FirstdataE4: Don't directly check the class against CreditCard.
Merge pull request #712 from Shopify/creditcard-check-fixes

Changes in preparation for v1.33.0 release
Bump for release v1.33.0