Added get_data() in cql_message_result_impl_t which takes a vector of bytes as a parameter instead of pointer to pointer **. The method get_data() with ** as a parameter was changed to private in this class.
Making the algorithm of dcaware_load_balancing_policy similar to its counterpart in C# driver, with all its drawbacks and throughput bottleneck.
Merge branch 'master' of https://github.com/jacekkasprzak/cpp-driver

+ deprecated get_data methods made public