Fix install doc

andreasnuesslein · Gauvain Pocentek · commit 4fba82eef461 · 2017-01-23T05:37:01.000+01:00
it's just confusing that it would say "pip" again :)
diff --git a/docs/install.rst b/docs/install.rst
@@ -12,7 +12,7 @@ Use :command:`pip` to install the latest stable version of ``python-gitlab``:
 
 The current development version is available on `github
 <https://github.com/gpocentek/python-gitlab>`__. Use :command:`git` and
-:command:`pip` to install it:
+:command:`python setup.py` to install it:
 
 .. code-block:: console
 
