[gtk+/wip/matthiasc/help-overlay] Add some docs

[Matthias Clasen <matthiasc src gnome org>]

commit 8cccd9eece5cdd2b9d8440cc70c880310ea06b69
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Oct 11 19:19:03 2015 -0400

    Add some docs

 gtk/gtkshortcutswindow.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkshortcutswindow.c b/gtk/gtkshortcutswindow.c
index 37ccc7c..9dcc264 100644
--- a/gtk/gtkshortcutswindow.c
+++ b/gtk/gtkshortcutswindow.c
@@ -29,6 +29,18 @@
 #include "gtkprivate.h"
 #include "gtkintl.h"
 
+/**
+ * SECTION:gtkshortcutswindow
+ * @title: GtkShortcutsWindow
+ * @short_description: Toplevel which shows help for shortcuts
+ *
+ * A GtkShortcutsWindow shows brief information about keyboard shortcuts
+ * and gestures, sorted in pages, columns and groups.
+ *
+ * The recommended way to construct a GtkShortcutsWindow is with GtkBuilder:
+ *
+ * [A simple example](https://git.gnome.org/browse/gtk+/tree/demos/gtk-demo/shortcuts.ui)
+ */
 
 typedef struct
 {