Release v2.2.0

This version of the SDK includes support for working with OpenTok 2.0 archives. (This API does not
work with OpenTok 1.0 archives.)

The OpenTok.create_session() method now includes a media_mode parameter, instead of a p2p parameter.

For details, see the reference documentation at
http://www.tokbox.com/opentok/libraries/server/python/reference/index.html.