- Changed helper and language autoload

- Changed language config
- Removed never used constants
- Changed rest_language in rest config file
- Adapted models that where extending FHC_Model
- Adapted code to load hlp_return_object
- Adapted code to use exit status codes constants

application/config/config.php

@@ -70,7 +70,7 @@ $config['url_suffix'] = '';
 | than english.
 |
 */
-$config['language']	= 'de-AT';
+$config['language']	= '';
 
 /*
 |--------------------------------------------------------------------------