made the tutorial part of the README and cleaned up the intro
made the tutorial part of the README and cleaned up the intro

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