Updated README

README.rst

@@ -13,7 +13,9 @@ PGPy: Pretty Good Privacy for Python
     :target: https://coveralls.io/github/SecurityInnovation/PGPy?branch=master
     :alt: Coveralls
 
-Homepage: None yet.
+.. image:: https://readthedocs.org/projects/pgpy/badge/?version=stable
+    :target: https://pgpy.readthedocs.io/en/stable/?badge=stable
+    :alt: Documentation Status
 
 `PGPy` is a Python (2 and 3) library for implementing Pretty Good Privacy into Python programs, conforming to the OpenPGP specification per RFC 4880.
 
@@ -36,7 +38,7 @@ To install PGPy, simply:
 Documentation
 -------------
 
-`PGPy Documentation <https://pgpy.readthedocs.io/en/latest/>`_
+`PGPy Documentation <https://pgpy.readthedocs.io/en/latest/>`_ on Read the Docs
 
 Discussion
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