Localize countries data into checkout page for a faster more reponsive checkout experience
* Tune the AJAX response to only send parameters that have changed
* Implementing localized countries for use by WPeC js
* Use jQuery.ajax to provide async meta transactions instead of jQuery.post
* Add countries localization for use by wp-e-commerce.js
* Use JQuery ajax to do async transaction
* removed replacements for meta updates from response
* ajax url wrapper is removed

** Also... **
* Added ability to define meta value defaults for WPSC_Country class meta properties.  Used this new feature to manage the default from "region_label".
Merge remote-tracking branch 'upstream/master' into pr-issue-1087-localization-geo-and-ajax-updates

Conflicts:
	wpsc-admin/db-upgrades/routines/10.php
	wpsc-components/theme-engine-v1/helpers/checkout.php
	wpsc-core/js/wp-e-commerce.js
	wpsc-includes/country-region-tax-util.php
	wpsc-includes/shopping_cart_functions.php
	wpsc-includes/wpsc-country.class.php
removed debug statement introduced at merge
manually remerged file, wpsc_shipping_region_list was messed up after the auto merge
Merge remote-tracking branch 'upstream/master' into pr-issue-1087-localization-geo-and-ajax-updates
Merge remote-tracking branch 'upstream/master' into pr-issue-1087-localization-geo-and-ajax-updates

Conflicts:
	wpsc-core/js/wp-e-commerce.js
Merge pull request #1129 from JeffPyeBrook/pr-issue-1087-localization-geo-and-ajax-updates

Localize countries data into checkout page for a faster more responsive checkout experience