add github repo link to docs (#58)

Author: stevebachmeier

docs/source/index.rst

@@ -6,6 +6,8 @@ Pseudopeople is a package intended to add configurable noise to a simulated
 census-scale data-set written using standard
 `scientific Python <https://www.scipy.org/>`_ tools.
 
+The github repo can be found at: https://github.com/ihmeuw/pseudopeople
+
 .. toctree::
    :maxdepth: 2