Hide legacy countries from lists
* Preserving country data for legacy country records
* Hidden by using a meta value attached to the country

*Also...*
Fixed return value format of countries array, function now used in admin screens
Merge remote-tracking branch 'upstream/master' into pr-121-uk-country-updates

Conflicts:
	wpsc-admin/db-upgrades/routines/11.php
Merge pull request #1192 from JeffPyeBrook/pr-121-uk-country-updates

Hide legacy countries from lists