Merge branch 'master' into permissions

- Added new core controller called Auth_Controller that extends FHC_Controller and manage the authentication
- All the controllers that were extending the CI_Controller now they extend the FHC_Controller
- All the controllers that were extending the FHC_Controller now they extend the Auth_Controller
- Added the method isAllowed to the FiltersLib to check if the authenticated user has the required permissions
- FilterWidget and controller Filters are using the method isAllowed from the FiltersLib

application/controllers/system/Messages.php

@@ -2,7 +2,7 @@
 
 if (! defined('BASEPATH')) exit('No direct script access allowed');
 
-class Messages extends FHC_Controller
+class Messages extends Auth_Controller
 {
 	private $uid; // contains the UID of the logged user
 
@@ -29,6 +29,13 @@ class Messages extends FHC_Controller
 
 		$this->load->model('person/Person_model', 'PersonModel');
 
+		$this->loadPhrases(array(
+								'global',
+								'person',
+								'lehre',
+								'ui',
+								'infocenter'));
+
 		$this->_setAuthUID(); // sets property uid
 	}