- adding check that transactionreference is set, was supposed to be a required field but was not always set in the secure trading IPN
- changing confirm function name to addOrderHistory
Merge branch 'master' of https://github.com/opencart/opencart into confirm_bug_branch
Merge pull request #2228 from chris-wm/confirm_bug_branch

Confirm bug branch
https://github.com/opencart/opencart/issues/2227
Merge branch 'master' of https://github.com/opencart/opencart
Merge branch 'master' of github.com:opencart/opencart
Fixed event class name call.