Added Debug as an external, auto enabling if TZ_DEBUG is true

@@ -20,7 +20,11 @@ class TzTools {
 
         // This is (hopefully) getting canned in 3.0
         add_action('widgets_init', Array('MenuWidget', 'init'));
+
         self::import('ShortCodes');
+        if (defined('TZ_DEBUG') && TZ_DEBUG === true) {
+            self::import('Debug');
+        }
     }
 
     public static function import($com) {