update installation

Author: kennethreitz

docs/starting/installation.rst

@@ -16,7 +16,12 @@ Installation Guides
 These guides go over the proper installation of :ref:`Python <which-python>`
 for development purposes, as well as setuptools, pip and virtualenv.
 
-- :ref:`Python 3 on MacOS <install3-osx>`.
+- :ref:`Python 3 on MacOS <install3-osx>`
+- :ref:`Python 3 on Windows <install3-windows>`.
+- :ref:`Python 3 on Linux <install3-liux>`.
+
+--------------------------------
+
 - :ref:`Python 2 on MacOS <install-osx>`.
 - :ref:`Python 2 on Microsoft Windows <install-windows>`.
 - :ref:`Python 2 on Ubuntu Linux <install-linux>`.