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/gtkwindow.c

@@ -40,7 +40,7 @@
 #include "gtkmain.h"
 #include "gtkmnemonichash.h"
 #include "gtkmenubar.h"
-#include "gtkiconfactory.h"
+#include "deprecated/gtkiconfactory.h"
 #include "gtkicontheme.h"
 #include "gtkmarshalers.h"
 #include "gtkplug.h"