Merge pull request #119 from osCommerce/23

Backport 23 changes into master
Merge pull request #121 from osCommerce/23

23
Merge pull request #127 from osCommerce/23

23
Merge pull request #129 from osCommerce/23

23
Merge pull request #131 from osCommerce/23

23
Fix $order variable collision
update changelog in docs
Merge pull request #134 from haraldpdl/worldpay

Fix $order variable collision