Enabled pypy and pytest session caching, updated README

.travis.yml

@@ -5,6 +5,7 @@ python:
 - 3.4
 - 3.5
 - 3.6
+- pypy
 
 env:
   global:
@@ -22,7 +23,10 @@ before_script:
 
 script: python -m pytest || python -m pytest --lf; # Run failed tests twice
 
-cache: pip
+cache:
+  pip: true
+  directories:
+    - .pytest_cache
 
 deploy:
   provider: pypi

README.rst

@@ -5,21 +5,25 @@ fbchat: Facebook Chat (Messenger) for Python
     :target: LICENSE.txt
     :alt: License: BSD
 
-.. image:: https://img.shields.io/badge/python-2.7%2C%203.4%2C%203.5%2C%203.6-blue.svg
+.. image:: https://img.shields.io/badge/python-2.7%2C%203.4%2C%203.5%2C%203.6%20pypy-blue.svg
     :target: https://pypi.python.org/pypi/fbchat
-    :alt: Supported python versions: 2.7, 3.4, 3.5 and 3.6
+    :alt: Supported python versions: 2.7, 3.4, 3.5, 3.6 and pypy
 
 .. image:: https://readthedocs.org/projects/fbchat/badge/?version=master
     :target: https://fbchat.readthedocs.io
     :alt: Documentation
 
+.. image:: https://travis-ci.org/carpedm20/fbchat.svg?branch=master
+    :target: https://travis-ci.org/carpedm20/fbchat
+    :alt: Travis CI
+
 Facebook Chat (`Messenger <https://www.facebook.com/messages/>`__) for Python.
 This project was inspired by `facebook-chat-api <https://github.com/Schmavery/facebook-chat-api>`__.
 
 **No XMPP or API key is needed**. Just use your email and password.
 
 Go to `Read the Docs <https://fbchat.readthedocs.io>`__ to see the full documentation,
-or jump right into the code by viewing the `examples <examples>`__
+or jump right into the code by viewing the `examples <https://github.com/carpedm20/fbchat/tree/master/examples>`__
 
 Installation: