Docs: Python 3.3 is not supported any more (#519)
Docs: Python 3.3 is not supported any more (#519)

Just a tiny fix to ensure that we don't promise Python 3.3 support.
Krukov/channels,Krukov/channels,Coread/channels,Coread/channels,andrewgodwin/channels,andrewgodwin/django-channels,django/channels