Issue #97: Update new to return {error, zero_length_key} and clean up unit tests
Issue #97: Update new to return {error, zero_length_key} and clean up unit tests

linearregression/riak-erlang-client,pma/riak-erlang-client,GabrielNicolasAvellaneda/riak-erlang-client,paulperegud/riak-erlang-client,inaka/riak-erlang-client,esl/riak-erlang-client,groovenauts-erlang/riak-erlang-client,rhumbertgz/riak-erlang-client,jmayfield74/riak-erlang-client,SiftLogic/riak-erlang-client