Clean output optimised

_examples_/Makefile

 	rm -f *.json *.pickle
 
 clean:
-	rm -f $(FIRSTLOGS) $(LASTLOGS) *.json *.pickle
+	@echo "\e[1m  * Example logs...\e[0m"
+	@rm -f $(FIRSTLOGS) $(LASTLOGS) *.json *.pickle