include iostream in the files which use std::cerr or std::cout

for some of these files this is needed to make to keep it compiling
after the next patch because the new ErrorMacros.hpp file will no
longer implicitly includes <iostream>. for the remaining files it is
just good style.

While at it, the includes for most of these files have been ordered in
order of decreasing abstraction level.

attic/test_ert.cpp

@@ -23,14 +23,16 @@
 #include <opm/core/grid/GridManager.hpp>
 #include <opm/core/grid/cart_grid.h>
 #include <opm/core/grid.h>
-#include <cstdio>
-#include <memory>
 #include <opm/core/props/IncompPropertiesBasic.hpp>
 #include <opm/core/props/IncompPropertiesFromDeck.hpp>
 
 
 #include <ert/ecl/ecl_grid.h>
 
+#include <cstdio>
+#include <memory>
+#include <iostream>
+
 using namespace std;
 
 #if 0

attic/test_readpolymer.cpp

@@ -16,6 +16,8 @@
 
 #include <opm/core/io/eclipse/EclipseGridParser.hpp>
 
+#include <iostream>
+
 // Test program for reading Eclipse Polymer keywords.
 
 int main(int argc, char** argv)

examples/import_rewrite.cpp

@@ -15,6 +15,8 @@
 #include <ert/ecl/fortio.h>
 #endif
 
+#include <iostream>
+
 /*
   Small utility to read through an ECLIPSE input deck and replace
   occurences of (large) numerical fields like COORD and ZCORN with

opm/core/io/eclipse/EclipseGridInspector.cpp

@@ -37,15 +37,16 @@
 #if HAVE_CONFIG_H
 #include "config.h"
 #endif
+#include <opm/core/io/eclipse/EclipseGridInspector.hpp>
+#include <opm/core/io/eclipse/EclipseGridParser.hpp>
+#include <opm/core/io/eclipse/SpecialEclipseFields.hpp>
 #include <stdexcept>
 #include <numeric>
 #include <cmath>
 #include <cfloat>
 #include <algorithm>
-#include <opm/core/io/eclipse/EclipseGridInspector.hpp>
-#include <opm/core/io/eclipse/EclipseGridParser.hpp>
-#include <opm/core/io/eclipse/SpecialEclipseFields.hpp>
 #include <array>
+#include <iostream>
 
 namespace Opm
 {

opm/core/io/eclipse/EclipseGridParserHelpers.hpp

@@ -36,13 +36,15 @@
 #ifndef OPM_ECLIPSEGRIDPARSERHELPERS_HEADER
 #define OPM_ECLIPSEGRIDPARSERHELPERS_HEADER
 
+#include <opm/core/utility/ErrorMacros.hpp>
+#include <opm/core/utility/linearInterpolation.hpp>
+#include <boost/date_time/gregorian/gregorian.hpp>
+
 #include <limits>
 #include <string>
 #include <istream>
 #include <vector>
-#include <opm/core/utility/ErrorMacros.hpp>
-#include <opm/core/utility/linearInterpolation.hpp>
-#include <boost/date_time/gregorian/gregorian.hpp>
+#include <iostream>
 
 namespace Opm
 {

opm/core/io/eclipse/SpecialEclipseFields.hpp

@@ -37,13 +37,15 @@
 #ifndef OPM_SPECIALECLIPSEFIELDS_HEADER
 #define OPM_SPECIALECLIPSEFIELDS_HEADER
 
-#include <string>
-#include <fstream>
-#include <limits>
 #include <opm/core/utility/ErrorMacros.hpp>
 #include <opm/core/io/eclipse/EclipseGridParserHelpers.hpp>
 #include <opm/core/io/eclipse/EclipseUnits.hpp>
 
+#include <string>
+#include <fstream>
+#include <iostream>
+#include <limits>
+
 namespace Opm
 {
 

opm/core/linalg/LinearSolverIstl.cpp

@@ -40,6 +40,7 @@
 #include <dune/istl/paamg/kamg.hh>
 
 #include <stdexcept>
+#include <iostream>
 
 
 namespace Opm

opm/core/pressure/IncompTpfa.cpp

@@ -33,6 +33,7 @@
 #include <opm/core/utility/ErrorMacros.hpp>
 #include <opm/core/utility/miscUtilities.hpp>
 #include <opm/core/wells.h>
+#include <iostream>
 #include <iomanip>
 #include <cmath>
 #include <algorithm>

opm/core/props/rock/RockCompressibility.cpp

@@ -25,6 +25,8 @@
 #include <opm/core/utility/ErrorMacros.hpp>
 #include <opm/core/utility/linearInterpolation.hpp>
 
+#include <iostream>
+
 namespace Opm
 {
 

opm/core/props/satfunc/SaturationPropsFromDeck_impl.hpp

@@ -26,6 +26,8 @@
 #include <opm/core/props/phaseUsageFromDeck.hpp>
 #include <opm/core/grid.h>
 
+#include <iostream>
+
 namespace Opm
 {
 

opm/core/simulator/SimulatorCompressibleTwophase.cpp

@@ -54,6 +54,7 @@
 
 #include <numeric>
 #include <fstream>
+#include <iostream>
 
 
 namespace Opm

opm/core/simulator/SimulatorIncompTwophase.cpp

@@ -50,6 +50,7 @@
 #include <boost/filesystem.hpp>
 #include <memory>
 
+#include <iostream>
 #include <numeric>
 #include <fstream>
 

opm/core/simulator/SimulatorIncompTwophase.hpp

@@ -22,6 +22,7 @@
 
 #include <memory>
 #include <vector>
+#include <iostream>
 
 struct UnstructuredGrid;
 struct Wells;

opm/core/simulator/initState_impl.hpp

@@ -30,6 +30,8 @@
 #include <opm/core/props/IncompPropertiesInterface.hpp>
 #include <opm/core/props/BlackoilPropertiesInterface.hpp>
 #include <opm/core/props/phaseUsageFromDeck.hpp>
+
+#include <iostream>
 #include <cmath>
 
 namespace Opm

opm/core/tof/TofDiscGalReorder.cpp

@@ -28,9 +28,11 @@
 #include <opm/core/utility/VelocityInterpolation.hpp>
 #include <opm/core/utility/parameters/ParameterGroup.hpp>
 #include <opm/core/linalg/blas_lapack.h>
+
 #include <algorithm>
 #include <cmath>
 #include <numeric>
+#include <iostream>
 
 namespace Opm
 {

opm/core/tof/TofReorder.cpp

@@ -22,9 +22,11 @@
 #include <opm/core/grid.h>
 #include <opm/core/utility/ErrorMacros.hpp>
 #include <opm/core/utility/SparseTable.hpp>
+
 #include <algorithm>
 #include <numeric>
 #include <cmath>
+#include <iostream>
 
 namespace Opm
 {

opm/core/transport/implicit/GravityColumnSolver_impl.hpp

@@ -20,7 +20,11 @@
 #include <opm/core/transport/GravityColumnSolver.hpp>
 #include <opm/core/linalg/blas_lapack.h>
 #include <opm/core/utility/ErrorMacros.hpp>
+
+#include <iostream>
+
 #include <sys/time.h>
+
 namespace Opm
 {
 

opm/core/transport/implicit/ImplicitTransport.hpp

@@ -38,6 +38,8 @@
 
 #include <opm/core/transport/implicit/ImplicitAssembly.hpp>
 
+#include <iostream>
+
 namespace Opm {
     namespace ImplicitTransportDetails {
         struct NRControl {

opm/core/transport/implicit/TransportSolverTwophaseImplicit.cpp

@@ -34,6 +34,8 @@
 #include <opm/core/simulator/TwophaseState.hpp>
 #include <opm/core/utility/miscUtilities.hpp>
 
+#include <iostream>
+
 namespace Opm
 {
 

opm/core/transport/reorder/ReorderSolverInterface.cpp

@@ -25,6 +25,7 @@
 
 #include <vector>
 #include <cassert>
+#include <iostream>
 
 
 void Opm::ReorderSolverInterface::reorderAndTransport(const UnstructuredGrid& grid, const double* darcyflux)

opm/core/transport/reorder/TransportSolverCompressibleTwophaseReorder.cpp

@@ -28,6 +28,7 @@
 #include <opm/core/utility/miscUtilitiesBlackoil.hpp>
 #include <opm/core/pressure/tpfa/trans_tpfa.h>
 
+#include <iostream>
 #include <fstream>
 #include <iterator>
 #include <numeric>

opm/core/transport/reorder/TransportSolverTwophaseReorder.cpp

@@ -27,6 +27,7 @@
 #include <opm/core/utility/miscUtilities.hpp>
 #include <opm/core/pressure/tpfa/trans_tpfa.h>
 
+#include <iostream>
 #include <fstream>
 #include <iterator>
 #include <numeric>

opm/core/utility/RootFinders.hpp

@@ -36,12 +36,12 @@
 #ifndef OPM_ROOTFINDERS_HEADER
 #define OPM_ROOTFINDERS_HEADER
 
-
+#include <opm/core/utility/ErrorMacros.hpp>
 
 #include <algorithm>
 #include <limits>
 #include <cmath>
-#include <opm/core/utility/ErrorMacros.hpp>
+#include <iostream>
 
 namespace Opm
 {

opm/core/utility/VelocityInterpolation.cpp

@@ -22,6 +22,8 @@
 #include <opm/core/grid.h>
 #include <opm/core/linalg/blas_lapack.h>
 
+#include <iostream>
+
 namespace Opm
 {
 

opm/core/utility/miscUtilities.cpp

@@ -26,6 +26,7 @@
 #include <opm/core/props/BlackoilPropertiesInterface.hpp>
 #include <opm/core/props/rock/RockCompressibility.hpp>
 #include <opm/core/utility/ErrorMacros.hpp>
+#include <iostream>
 #include <algorithm>
 #include <functional>
 #include <cmath>

opm/core/utility/miscUtilitiesBlackoil.cpp

@@ -27,6 +27,7 @@
 #include <opm/core/simulator/BlackoilState.hpp>
 #include <opm/core/simulator/WellState.hpp>
 #include <opm/core/utility/ErrorMacros.hpp>
+#include <iostream>
 #include <algorithm>
 #include <functional>
 #include <cmath>

opm/core/wells/WellsGroup.cpp

@@ -19,11 +19,13 @@
 
 #include "config.h"
 #include <opm/core/wells/WellsGroup.hpp>
-#include <cmath>
-#include <memory>
 #include <opm/core/wells.h>
 #include <opm/core/props/phaseUsageFromDeck.hpp>
 
+#include <cmath>
+#include <memory>
+#include <iostream>
+
 namespace Opm
 {
 

opm/core/wells/WellsManager.cpp

@@ -35,6 +35,7 @@
 #include <map>
 #include <string>
 #include <utility>
+#include <iostream>
 
 
 // Helper structs and functions for the implementation.

tests/test_column_extract.cpp

@@ -13,6 +13,7 @@
 #include <opm/core/io/eclipse/EclipseGridParser.hpp>
 
 #include <cstddef>
+#include <iostream>
 
 BOOST_AUTO_TEST_CASE(SingleColumnTest)
 {