Added class SinglePvtDead, add parameter 'props_use_spline' to simulators.

Recall that the class that used to be called SinglePvtDead has
been renamed to SinglePvtDeadSpline. If 'props_use_spline' is true,
that class is used (this is the default), which makes a monotone
spline that is uniformly, densely sampled. The new class simply
uses linear interpolation in the input tables.

opm/core/fluid/BlackoilPropertiesFromDeck.cpp

@@ -23,10 +23,11 @@ namespace Opm
 {
 
     BlackoilPropertiesFromDeck::BlackoilPropertiesFromDeck(const EclipseGridParser& deck,
-                                                           const UnstructuredGrid& grid)
+                                                           const UnstructuredGrid& grid,
+                                                           const bool use_spline)
     {
         rock_.init(deck, grid);
-        pvt_.init(deck);
+        pvt_.init(deck, use_spline);
         satprops_.init(deck, grid);
 	if (pvt_.numPhases() != satprops_.numPhases()) {
 	    THROW("BlackoilPropertiesBasic::BlackoilPropertiesBasic() - Inconsistent number of phases in pvt data ("

opm/core/fluid/BlackoilPropertiesFromDeck.hpp

@@ -43,7 +43,8 @@ namespace Opm
         ///                      mapping from cell indices (typically from a processed grid)
         ///                      to logical cartesian indices consistent with the deck.
         BlackoilPropertiesFromDeck(const EclipseGridParser& deck,
-                                   const UnstructuredGrid& grid);
+                                   const UnstructuredGrid& grid,
+                                   const bool use_spline);
 
         /// Destructor.
         virtual ~BlackoilPropertiesFromDeck();

opm/core/fluid/blackoil/BlackoilPvtProperties.hpp

@@ -47,7 +47,7 @@ namespace Opm
         BlackoilPvtProperties();
 
         /// Initialize from deck.
-	void init(const EclipseGridParser& deck);
+	void init(const EclipseGridParser& deck, const bool use_spline);
 
         /// Number of active phases.
         int numPhases() const;