Add information about default value for `max_results` when paginating.
Add information about default value for `max_results` when paginating.

basho/riak-python-client,basho/riak-python-client,bmess/riak-python-client,basho/riak-python-client,GabrielNicolasAvellaneda/riak-python-client,GabrielNicolasAvellaneda/riak-python-client,bmess/riak-python-client