week-header: created the basic skeleton of the week-header

Created the .h, .c and .ui file of week header. Also made changes in the Makefile.am for it to get built.

src/views/gcal-week-view.h

@@ -21,7 +21,7 @@
 #define __GCAL_WEEK_VIEW_H__
 
 #include "gcal-manager.h"
-
+#include "gcal-view.h"
 #include "gcal-subscriber-view.h"
 
 G_BEGIN_DECLS
@@ -54,6 +54,9 @@ void           gcal_week_view_set_first_weekday  (GcalWeekView *view,
                                                   gint          day_nr);
 void           gcal_week_view_set_use_24h_format (GcalWeekView *view,
                                                   gboolean      use_24h);
+gint           gcal_week_view_get_sidebar_width  (GtkWidget *widget);
+icaltimetype*  gcal_week_view_get_initial_date   (GcalView *view);
+gint           gcal_week_view_get_start_grid_y   (GtkWidget *widget);
 
 G_END_DECLS