Checkout field id as array index
Checkout fields array is returned with the checkout field id as the index, rather than an abitrarily assinged number.  Array order is still be checkout border.
More parameter name changes
replace ctype test with a function to check proper type of region id
Merge remote-tracking branch 'upstream/master' into pr-adjust-method-parameter-names
Merge remote-tracking branch 'upstream/master' into pr-adjust-method-parameter-names

Conflicts:
	wpsc-includes/wpsc-country.class.php
more fixes
Country list sort order
Countries list is returned sorted by country name, as in prior release.  Optional parameter available if caller needs country list sorted by country id.
Merge branch 'pr-countries-list-sort-order' into pr-adjust-method-parameter-names
Merge branch 'pr-adjust-method-parameter-names' into dev-master
Merge branch 'pr-return-checkout-fields-with-checkout-item-id' into dev-master