Have removed the SimulatorState base class, and instead replaced with
the SimulationDatacontainer class from opm-common. The SimulatorState
objects were typcially created with a default constructor, and then
explicitly initialized with a SimulatorState::init() method. For the
SimulationDataContainer RAII is employed; the init( ) has been removed -
and there is no default constructor.
1. Added method setCellDataComponent()
2. Removed setFirstSat()
Implemented saturation initialisation using setCellDataComponent()
instead of setFirstSat(). This way the template<class Props> has been
removed from the SimulatorState class.
