Adds Refund TypeField for AppliedPayments.  Updates PaymentGatewayMethodBase Refund method to require an amount for partial refunds.
Merge remote-tracking branch 'merchello/1.0.1' into 1.0.1
Finishes up the server side implementation of the AuthorizeNet payment provider.  Starts the UI.
Merge pull request #525 from rustyswayne/1.0.1

Adds Refund TypeField for AppliedPayments. Updates PaymentGatewayMethodBase Refund method to require an amount for partial refunds.