Updated the doc with python setup guide (#204)

* Update README.rst

* Update index.rst
diff --git a/README.rst b/README.rst
index 4be0c5d..72237a7 100644
--- a/README.rst
+++ b/README.rst
@@ -22,6 +22,10 @@
 
 .. _pip: https://pip.pypa.io/en/stable/
 
+For more information on setting up your Python development environment, please refer to `Python Development Environment Setup Guide`_ for Google Cloud Platform.
+
+.. _`Python Development Environment Setup Guide`: https://cloud.google.com/python/setup
+
 Documentation
 -------------