Move wholly deprecated classes to gtk/deprecated/

We've recently a number of classes wholly. For these cases,
move the headers and sources to gtk/deprecated/ and adjust
Makefiles and includes accordingly.

Affected classes:
GtkAction
GtkActionGroup
GtkActivatable
GtkIconFactory
GtkImageMenuItem
GtkRadioAction
GtkRecentAction
GtkStock
GtkToggleAction
GtkUIManager

gtk/gtkbuilder.c

@@ -254,7 +254,7 @@
 #include "gtktypebuiltins.h"
 #include "gtkwindow.h"
 #include "gtkicontheme.h"
-#include "gtkstock.h"
+#include "deprecated/gtkstock.h"
 
 
 static void gtk_builder_class_init     (GtkBuilderClass *klass);