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/gtkfilechooserbutton.c

@@ -36,11 +36,11 @@
 #include "gtkcombobox.h"
 #include "gtkdnd.h"
 #include "gtkicontheme.h"
-#include "gtkiconfactory.h"
+#include "deprecated/gtkiconfactory.h"
 #include "gtkimage.h"
 #include "gtklabel.h"
 #include "gtkliststore.h"
-#include "gtkstock.h"
+#include "deprecated/gtkstock.h"
 #include "gtktreemodelfilter.h"
 #include "gtkseparator.h"
 #include "gtkfilechooserdialog.h"