Merge pull request #16 from gijsk/patch-2

Add detail on how to switch to pip-based MozPhab

mozphab-windows.rst

@@ -2,6 +2,10 @@
 Windows 10 MozPhab Installation Guide
 #####################################
 
+----------------------
+Installing MozPhab including ``arcanist`` setup
+----------------------
+
 Here are step-by-step instructions to getting MozPhab working on Windows 10 in a
 `MozillaBuild <https://wiki.mozilla.org/MozillaBuild>`_ environment.
 They should work for Git Bash and PowerShell as well. For the sake of this
@@ -40,6 +44,14 @@ the ``C:\mozilla-build\start-shell.bat``.
      $ moz-phab arc -h
      $ moz-phab -h
 
+   
+----------------------
+Upgrading a previous non-pip install of moz-phab to use pip
+----------------------
+
+#. Run ``pip3 install MozPhab``.
+
+#. You may need to restart your shell for your changes to take effect. You can check using ``moz-phab version`` - if it works, you've successfully switched to ``moz-phab`` using ``pip``.
+
 #. At this point, you should be all set up. If you have already installed ``moz-phab``
    without using ``pip``, you should remove the file.
-