The criteria for whether the fluid is saturated or not is moved from the
within the pvt calculations to the solver, and passed to the pvt
calculations as a array of boolean values.
Not all implementations support the TR1, and if they do, the type
might not be in a namespace called std::tr1 . Favour the
implementation from Boost for reasons of portability.
This is inspired (and necessitated) by commit OPM/opm-core@68eb3fb
which, incidentally, cleaned up some header pollution on which we
inadvertently depended.
