Update to v.5 to fix error

git-svn-id: https://plugins.svn.wordpress.org/transdirect-shipping/trunk@1033642 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix bugs not updating to cart v 1.6

git-svn-id: https://plugins.svn.wordpress.org/transdirect-shipping/trunk@1033647 b8457f37-d9ea-0310-8a92-e5e31aec5664