Merge pull request joestump#202 from tleach/better-docs

Make more explicit about lack of OAuth 2.0 support

Author: jaitaiwan

README.md

@@ -1,5 +1,7 @@
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+## Note: This library implements OAuth 1.0 and *not OAuth 2.0*. 
+
 # Overview
 python-oauth2 is a python oauth library fully compatible with python versions: 2.6, 2.7, 3.3 and 3.4. This library is depended on by many other downstream packages such as Flask-Oauth.