view iface: remove manager property

There's no reason at all why manager should be a property inside the
views. It won't benefit of bindings or anything else inherent to GObject
property system.

src/gcal-month-view.h

@@ -45,15 +45,14 @@ struct _GcalMonthViewClass
   GcalSubscriberViewClass parent_class;
 };
 
-GType          gcal_month_view_get_type         (void);
-
-GtkWidget*     gcal_month_view_new              (GcalManager *manager);
-
-void           gcal_month_view_set_first_weekday (GcalMonthView *view,
-						  gint           day_nr);
-
+GType          gcal_month_view_get_type           (void);
+GtkWidget*     gcal_month_view_new                (void);
+void           gcal_month_view_set_manager        (GcalMonthView *month_view,
+                                                   GcalManager   *manager);
+void           gcal_month_view_set_first_weekday  (GcalMonthView *view,
+                                                   gint           day_nr);
 void           gcal_month_view_set_use_24h_format (GcalMonthView *view,
-						   gboolean       use_24h);
+                                                   gboolean       use_24h);
 
 G_END_DECLS