Fix typo in function call name
Fix return value in utility function to return custom keys
Fix incorrect variable name in get custom values utility function
more translation implementation
Error notices on latest master and UPS

`Notice: Undefined variable: wpec_ash_tools in D:\wamp\www\latestwpec\wp-content\plugins\WP-e-Commerce-master\wpsc-shipping\ups_20.php on line 752`

Adding the $wpec_ash_tools to the globals seems to fix it. I looked at USPS and usps has it in the globals so i based my change on that
Split load checkout data into two functions, wpsc_checkout_form_fields and wpsc_checkout_unique_names
New functions ruturn arrays of values
Pass each meta key through a validation function
Implemented visitor meta meta key alias function.
IMplemented visitor meta key database upgrade function.
completed visitor meta key alias function implementation
added check to prevent internal meta keys from being aliased
Merge pull request #910 from misulicus/patch-11

Error notices on latest master and UPS
Merge pull request #909 from JeffPyeBrook/pr-visitor-meta

PR Visitor Meta Bug Fix + Visitor Meta Value Alias + Visitor Meta Database Upgrade