GcalMonthView changes.

Created GcalView interface, used in GcalMonthView
Added implementation for GtkContainer virtual funcs in GcalMonthView
Improving size_allocate/drawing methods
Added day selection drawing

src/gcal-view.c

@@ -70,12 +70,3 @@ gcal_view_is_in_range (GcalView     *view,
 
   return GCAL_VIEW_GET_INTERFACE (view)->is_in_range (view, date);
 }
-
-void
-gcal_view_add_event (GcalView  *view,
-                     GtkWidget *event)
-{
-  g_return_if_fail (GCAL_IS_VIEW (view));
-
-  GCAL_VIEW_GET_INTERFACE (view)->add_event (view, event);
-}