adding incomplete kmeans.

I'm having a problem with the broadcast, and still need to implement the logic

toolkit/Makefile

@@ -0,0 +1,42 @@
+export CC  = gcc
+export CXX = g++
+export MPICXX = mpicxx
+export LDFLAGS= -pthread -lm 
+export CFLAGS = -Wall -O3 -msse2  -Wno-unknown-pragmas -fPIC -I../src
+
+# specify tensor path
+BIN = kmeans
+# objectives that makes up rabit library
+RABIT_OBJ = allreduce_base.o allreduce_robust.o engine.o
+MPIOBJ = engine_mpi.o
+
+OBJ = $(RABIT_OBJ) kmeans.o
+MPIBIN = kmeans.mpi
+.PHONY: clean all
+
+all: $(BIN) $(MPIBIN)
+
+allreduce_base.o: ../src/allreduce_base.cc ../src/*.h
+engine.o: ../src/engine.cc ../src/*.h
+allreduce_robust.o: ../src/allreduce_robust.cc ../src/*.h
+engine_mpi.o: ../src/engine_mpi.cc
+kmeans.o: kmeans.cpp ../src/*.h
+
+# we can link against MPI version to get use MPI
+kmeans: kmeans.o  $(RABIT_OBJ)
+kmeans.mpi: kmeans.o $(MPIOBJ)
+ 
+$(BIN) : 
+	$(CXX) $(CFLAGS) $(LDFLAGS) -o $@ $(filter %.cpp %.o %.c %.cc, $^)
+
+$(OBJ) : 
+	$(CXX) -c $(CFLAGS) -o $@ $(firstword $(filter %.cpp %.c %.cc, $^) )
+
+$(MPIBIN) : 
+	$(MPICXX) $(CFLAGS)  $(LDFLAGS) -o $@ $(filter %.cpp %.o %.c %.cc, $^)
+
+$(MPIOBJ) : 
+	$(MPICXX) -c $(CFLAGS) -o $@ $(firstword $(filter %.cpp %.c %.cc, $^) )
+
+clean:
+	$(RM) $(OBJ) $(BIN) $(MPIBIN) *~ ../src/*~