Handle deprecation of customer_details meta value gracefully
Create general purpose meta value deprecation approach
back out unrelated change
back out whitepsace change
Adding upgrade of 'customer_details' checkout item to upgrade process
using visitor meta in place of customer meta for clarity.
Fixes from testing
Deprecated meta handling
Meta utility function testing and cleanup
finished testing fixes
Merge branch 'user-profile-checkout-meta' into dev-master

Conflicts:
	wpsc-includes/wpsc-deprecated-meta.php