- 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/controllers/api/v1/CheckUserAuth.php

@@ -13,7 +13,7 @@ class CheckUserAuth extends REST_Controller
 
 		// Loads helper message to manage returning messages
 		// NOTE: loaded here because it does not extend the APIv1_Controller
-		$this->load->helper('hlp_message');
+		$this->load->helper('hlp_return_object');
 	}
 
 	/**