First attempt at JCB integration committed on behalf of Brian
Refactored Organization.php

1) Replaced the last $po's with $org
2) Renamed key to org in Organization.  key is a MySQL reserved keyword
3) Moved test flag into Organization, which then made it unnecessary to
pass it all over the place
4) Added a testing flag to the subject line of the receipt email
Donate button no longer jumps when clicked