use a .cpp instead of an _impl.hpp file for SaturationPropsFromDeck

this avoids having to include the "Evaluation.hpp" file as the first
thing in the morning.

opm/core/simulator/ExplicitArraysFluidState.hpp

@@ -20,7 +20,9 @@
 #ifndef OPM_EXPLICIT_ARRAYS_FLUID_STATE_HEADER_INCLUDED
 #define OPM_EXPLICIT_ARRAYS_FLUID_STATE_HEADER_INCLUDED
 
-#include <opm/core/simulator/BlackoilState.hpp>
+#include <opm/core/props/BlackoilPhases.hpp>
+
+#include <array>
 
 namespace Opm
 {

opm/core/simulator/ExplicitArraysSatDerivativesFluidState.hpp

@@ -23,6 +23,10 @@
 #include <opm/material/localad/Evaluation.hpp>
 #include <opm/material/localad/Math.hpp>
 
+#include <opm/core/props/BlackoilPhases.hpp>
+
+#include <array>
+
 namespace Opm
 {