Merge pull request #524 from rustyswayne/1.0.1

Capture, Refund and Void payment methods on the AuthorizeNetPaymentProcessor.
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.