new module riak_pb_ts_codec: en/decode pb messages for TS calls
new module riak_pb_ts_codec: en/decode pb messages for TS calls

moved here, and to be used, from riak_kv/riak_kv_pb_timeseries.erl and
riak-erlang-client/riakc_ts_{put,query}_operator.erl

drewkerrigan/riak_pb,basho/riak_pb