Makefileadaption for proper status output

scripts/Makefile

 	venv3/bin/pip install -r requirements.txt
 
 clean: venv3
-	@echo "\033[1;33mCleaning up unittest...\e[0m"
-	@echo "\e[1m  * Testresults from last testrun\e[0m"
+	@echo -e "\033[1;33mCleaning up unittest...\e[0m"
+	@echo -e "\e[1m  * Testresults from last testrun\e[0m"
 	@ls testresults | xargs -i echo "    testresults/{}"
 	@ls testresults | xargs -i rm -f "testresults/{}"
-	@echo "\e[1m  * Collected coverage information\e[0m"
+	@echo -e "\e[1m  * Collected coverage information\e[0m"
 	@$(COV3_CMD) erase
+	@rm -r venv3
 
 cleanall: clean
 	@echo "\e[1m  * Virtualenv\e[0m"