add refunds method to example app

Signed-off-by: lloyd <manchesterboy@gmail.com>
clean up

Signed-off-by: lloyd <manchesterboy@gmail.com>
some refactoring after getting stuff to work

Signed-off-by: lloyd <manchesterboy@gmail.com>
clean up and reduction of xml

Signed-off-by: lloyd <manchesterboy@gmail.com>
test script for wirecard purchase call

Signed-off-by: lloyd <manchesterboy@gmail.com>