SimpleXML is included in PHP by default as of PHP 5.1.2. Because Drupal 7 requires PHP 5.2.5 or higher, we no longer have to check for SimpleXML in hook_requirements().

Remove title key from theme_uc_canadapost_option_label(), because we don't use it. Coding standards.

Replace fieldsets with vertical tabs for admin settings. Add jQuery to generate summaries on vertical tabs.

Remove RulesPluginUI::$basePath setting because this is no longer needed in Rules 7.x-2.0-beta2 and higher.

Use extension_loaded() instead of class_exists() in hook_requirements().  Modify URL link for SimpleXML.

Finally, drupal_http_request() has been fixed (see #183435)! So remove _uc_canadapost_drupal_http_request() and replace it with drupal_http_request().  Rename some functions to make more sense.  Make some Coder changes.  Separate debug information into  so that rate sorting works properly.