[gtk+] Add reference to HowDoI and getting-started

[Bastian Ilsø Hougaard <bastianilso src gnome org>]

commit 9c49144cbe193a48414bf1b65045e614d68c4cb9
Author: Bastian Ilsø <bastianilso src gnome org>
Date:   Mon Feb 2 08:13:28 2015 +0100

    Add reference to HowDoI and getting-started

 gtk/gtkapplication.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkapplication.c b/gtk/gtkapplication.c
index 5afae77..80658c5 100644
--- a/gtk/gtkapplication.c
+++ b/gtk/gtkapplication.c
@@ -111,6 +111,10 @@
  * manager may not honor the inhibitor, but it can be expected to
  * inform the user about the negative consequences of ending the
  * session while inhibitors are present.
+ *
+ * ## See Also ## {#seealso}
+ * HowDoI: [Using GtkApplication] (https://wiki.gnome.org/HowDoI/GtkApplication)
+ * [Getting Started with GTK+: Basics] 
(https://developer.gnome.org/gtk3/stable/gtk-getting-started.html#id-1.2.3.3) 
  */
 
 enum {