Update python versions in README

Author: aiham

README.rst

@@ -213,7 +213,7 @@ Requirements
 
 You need an OpenTok API key and API secret, which you can obtain at https://dashboard.tokbox.com/
 
-The OpenTok Python SDK requires Python 2.6, 2.7, 3.2, 3.3, or 3.4
+The OpenTok Python SDK requires Python 2.6, 2.7, 3.3, 3.4, 3.5 or 3.6
 
 Release Notes
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