Ready to test card authentication
 - created client interface and implementation with RestEasy
Working card authentication!
 - tests proving both good and bad requests
update documentation and fill out tests
Working Sale and Auth
 - the API is really clumsy though and some clean-up will be needed here.
cleanup
remove hard coded amount
remove unused
check more response fields in test
imports
add annotation to correct transactionID name
 - and check for it in the tests