add order refund pay

go/gopath/src/fohow.com/apps/models/order_model/init.go

@@ -8,5 +8,5 @@ import (
 )
 
 func init() {
-	orm.RegisterModel(new(Order), new(Cart), new(OrderDetail))
+	orm.RegisterModel(new(Order), new(Cart), new(OrderDetail), new(OrderRefund))
 }