move today class method to base class

tabellio/agenda/event.py

@@ -96,17 +96,18 @@ class BaseEvent(Item):
             return False
         return True
 
+    def todayclass(self):
+        if self.start.timetuple()[:3] == datetime.datetime.today().timetuple()[:3]:
+            return 'today'
+        return ''
+
+
 class Event(BaseEvent):
     implements(IEvent)
 
     def klass(self):
         return 'generic-event'
 
-    def todayclass(self):
-        if self.start.timetuple()[:3] == datetime.datetime.today().timetuple()[:3]:
-            return 'today'
-        return ''
-
 class EventBaseView:
     def next_event_url(self, portal_type=None):
         # do not go more than 100 days in the future