USPS with Dimensions Support v6.5 for os

for osCommerce Online Merchant v2.3

This is an update to the USPS Methods contribution designed for full compatibility with osCommerce 2.3.4. Changes for 6.5 *Combined XML classes into one file. Check for PHP version is now done in the class file and not the shipping module. *Changed module name to usps_ds to avoid confusion or conflict with the osCommerce version. All configuration variables and text definitions have been updated accordingly. *Updated utility programs for compatibility with osCommerce 6.3.4. *Changed the Curl connection method slightly to fix a connection error. *Created language files for the USPS utilities instead of using hard coded English. Complete contribution is attached.