BugFix: All off functionality

function/rooms.py

         logger.info("Switching all off \"%s\"", type(self).__name__)
         for name, obj in inspect.getmembers(self):
             try:
-                if obj.__module__ == 'devices':
+                if obj.__module__.startswith('devices'):
                     obj.all_off()
             except AttributeError:
                 pass    # not a module or has no method all_off