Add status comparison function

Simply checks the numerical value of status for now. If more statuses
are added in future, this check may need to be made more complex.

source/lib/StatusBoard/Status.class.php

@@ -40,6 +40,10 @@ class StatusBoard_Status {
         return self::$descriptions[$status];
     }
     
+    public static function isMoreSevere($base, $test) {
+        return ($test > $base);
+    }
+    
 }
 
 ?>