[gtk+] docs: add docs for GtkCellEditableIface

[William Jon McCann <mccann src gnome org>]

commit 224a8e176341f672f4cacfd9a7ce7ea7babbbc01
Author: William Jon McCann <william jon mccann gmail com>
Date:   Mon Jan 20 23:28:20 2014 -0500

    docs: add docs for GtkCellEditableIface

 gtk/gtkcelleditable.h |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcelleditable.h b/gtk/gtkcelleditable.h
index 7478932..dfd3a51 100644
--- a/gtk/gtkcelleditable.h
+++ b/gtk/gtkcelleditable.h
@@ -35,10 +35,21 @@ G_BEGIN_DECLS
 typedef struct _GtkCellEditable      GtkCellEditable; /* Dummy typedef */
 typedef struct _GtkCellEditableIface GtkCellEditableIface;
 
+/**
+ * GtkCellEditableIface:
+ * @editing_done: Signal is a sign for the cell renderer to update its
+ *    value from the cell_editable.
+ * @remove_widget: Signal is meant to indicate that the cell is
+ *    finished editing, and the widget may now be destroyed.
+ * @start_editing: Begins editing on a cell_editable.
+ */
 struct _GtkCellEditableIface
 {
+  /*< private >*/
   GTypeInterface g_iface;
 
+  /*< public >*/
+
   /* signals */
   void (* editing_done)  (GtkCellEditable *cell_editable);
   void (* remove_widget) (GtkCellEditable *cell_editable);