Fixed composite column encoding errors on ruby 2.0.0
Fixed composite column encoding errors on ruby 2.0.0

String literals are utf-8 encoded

stipple/cassandra_new,cassandra-rb/cassandra,stipple/cassandra_new,stipple/cassandra_new,cassandra-rb/cassandra,cassandra-rb/cassandra,cassandra-rb/cassandra,stipple/cassandra_new