PVT properties: allow them to be temperature dependent

Note that this patch does not introduce any real temperature
dependence but only changes the APIs for the viscosity and for the
density related methods. Note that I also don't like the fact that
this requires so many changes to so many files, but with the current
design of the property classes I cannot see a way to avoid this...

opm/core/props/BlackoilPropertiesBasic.cpp

@@ -91,6 +91,7 @@ namespace Opm
 
     /// \param[in]  n      Number of data points.
     /// \param[in]  p      Array of n pressure values.
+    /// \param[in]  T      Array of n temperature values.
     /// \param[in]  z      Array of nP surface volume values.
     /// \param[in]  cells  Array of n cell indices to be associated with the p and z values.
     /// \param[out] mu     Array of nP viscosity values, array must be valid before calling.
@@ -98,6 +99,7 @@ namespace Opm
     ///                    array must be valid before calling.
     void BlackoilPropertiesBasic::viscosity(const int n,
                                             const double* p,
+                                            const double* T,
                                             const double* z,
                                             const int* /*cells*/,
                                             double* mu,
@@ -106,12 +108,13 @@ namespace Opm
         if (dmudp) {
             OPM_THROW(std::runtime_error, "BlackoilPropertiesBasic::viscosity()  --  derivatives of viscosity not yet implemented.");
         } else {
-            pvt_.mu(n, p, z, mu);
+            pvt_.mu(n, p, T, z, mu);
         }
     }
 
     /// \param[in]  n      Number of data points.
     /// \param[in]  p      Array of n pressure values.
+    /// \param[in]  T      Array of n temperature values.
     /// \param[in]  z      Array of nP surface volume values.
     /// \param[in]  cells  Array of n cell indices to be associated with the p and z values.
     /// \param[out] A      Array of nP^2 values, array must be valid before calling.
@@ -121,7 +124,8 @@ namespace Opm
     ///                    array must be valid before calling. The matrices are output
     ///                    in Fortran order.
     void BlackoilPropertiesBasic::matrix(const int n,
-                                         const double* /*p*/,
+                                         const double* p,
+                                         const double* T,
                                          const double* /*z*/,
                                          const int* /*cells*/,
                                          double* A,
@@ -130,7 +134,7 @@ namespace Opm
         const int np = numPhases();
         assert(np <= 2);
         double B[2]; // Must be enough since component classes do not handle more than 2.
-        pvt_.B(1, 0, 0, B);
+        pvt_.B(1, p, T, 0, B);
         // Compute A matrix
 // #pragma omp parallel for
         for (int i = 0; i < n; ++i) {