Merge pull request 'enhanced makefile' (#1) from MrBesen/Log:patch-1 into master

Reviewed-on: https://git.okaestne.de/okaestne/Log/pulls/1

.gitignore

@@ -3,4 +3,7 @@ Log.o
 # for test
 test
 test.o
-*.log
+*.log
+
+# dependency files
+*.d

Makefile

@@ -10,7 +10,10 @@ test: $(TARGET) $(TEST).o
 	$(CXX) -o test $^
 
 %.o: %.cpp
+	$(CXX) $(INCLUDES) $^ -MM -MT $@ > $*.d
 	$(CXX) -c -o $@ $(CFLAGS) $^
 
 clean:
 	$(RM) $(TARGET) $(TEST) $(TEST).o *.log
+
+include *.d