This commit introduces a container
Opm::data::GuideRateValue
that packages a 'std::array' and 'std::bitset' into that array.
This container is intended as the main vehicle for transporting
per-phase guiderate values (Oil, Gas, Water, and Resvoir Voidage
Volume supported initially) calculated by the simulator to the
output layer. We support the serialization operations read and
write in order to plug into the collective communications layer used
in the simulator.
Add unit tests to exercise the new container.
