Glue code for using those editable widgets.

Added GcalEventWidget::activated signal.
Fixed bug in GcalMonthView preventing to get button events.
Added methods in GcalUtils from Evo for formatting time.
..and stuff

src/gcal-event-widget.h

@@ -38,6 +38,14 @@ typedef struct _GcalEventWidget                   GcalEventWidget;
 typedef struct _GcalEventWidgetClass              GcalEventWidgetClass;
 typedef struct _GcalEventWidgetPrivate            GcalEventWidgetPrivate;
 
+struct _GcalEventWidgetClass
+{
+  GtkWidgetClass parent_class;
+
+  /* signals */
+  void (*activated)  (GcalEventWidget *event_widget);
+};
+
 struct _GcalEventWidget
 {
   GtkWidget parent;
@@ -45,12 +53,6 @@ struct _GcalEventWidget
   GcalEventWidgetPrivate *priv;
 };
 
-struct _GcalEventWidgetClass
-{
-  GtkWidgetClass parent_class;
-};
-
-
 GType         gcal_event_widget_get_type                   (void);
 
 GtkWidget*    gcal_event_widget_new                        (gchar           *uuid);