Fix reading version in docs/conf.py

docs/conf.py

@@ -56,11 +56,10 @@ copyright = u'2015, David Arthur'
 # built documents.
 #
 # The short X.Y version.
-with open('../VERSION') as version_file:
-  version = version_file.read()
+exec(open('../kafka/version.py').read())
 
 # The full version, including alpha/beta/rc tags.
-release = version
+release = __version__
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.