[pygobject] getting started: add a note for the tutorial and the API reference

[Christoph Reiter <creiter src gnome org>]

commit 0b0fe8cef03db692edd2574900d5cbfa0d70da28
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Wed Feb 13 17:44:00 2019 +0100

    getting started: add a note for the tutorial and the API reference
    
    So that there is a clear path on what to do after successfully getting the
    example app running.

 docs/getting_started.rst | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/docs/getting_started.rst b/docs/getting_started.rst
index ff9e657b..63584a6a 100644
--- a/docs/getting_started.rst
+++ b/docs/getting_started.rst
@@ -30,6 +30,11 @@ and their dependencies. Follow the instructions for your platform below.
 |windows-logo| :ref:`Windows <windows-getting-started>` |macosx-logo| :ref:`macOS <macosx-getting-started>`  
|opensuse-logo| :ref:`openSUSE <opensuse-getting-started>`
 ======================================================= ==================================================== 
==========================================================
 
+After running the example application have a look at the "`Python GTK+ 3
+Tutorial <https://python-gtk-3-tutorial.readthedocs.io>`__" for more examples
+on how to create GTK+ apps and the "`PyGObject API Reference
+<https://lazka.github.io/pgi-docs>`__" for API documentation for all supported
+libraries.
 
 .. _windows-getting-started: