First approach of Event view ended.

For now the view, works only for viewing, and not for editing.
The delete button works, though.
It's needed yet a notification for an event deletion.

src/gcal-event-view.h

@@ -47,6 +47,9 @@ struct _GcalEventView
 struct _GcalEventViewClass
 {
   GtkGridClass parent_class;
+
+  /* Signals */
+  void (*done) (GcalEventView *view);
 };
 
 GType         gcal_event_view_get_type                   (void);