Compile the combined algo

src/Makefile

@@ -28,7 +28,7 @@ NP = 5
 
 MPISRC = hierarchical.cpp  masterworker.cpp  mw_addslave.cpp \
          perf.cpp  sequential.cpp  tensormatrix_mpi.cpp      \
-         utils.cpp  utils_parall.cpp profiling.cpp
+         utils.cpp  utils_parall.cpp profiling.cpp mw_combined.cpp
 MPIOBJ= $(MPISRC:.cpp=.o)