PEP8 fixes and import re-ordering for riak client.
PEP8 fixes and import re-ordering for riak client.

Fix some minor styling to be PEP8 compliant. Re-order the imports.

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