tools: gracefully quit engine and game processes
tools: gracefully quit engine and game processes

galek/crown,dbartolini/crown,taylor001/crown,mikymod/crown,mikymod/crown,dbartolini/crown,taylor001/crown,galek/crown,mikymod/crown,dbartolini/crown,taylor001/crown,galek/crown,dbartolini/crown,taylor001/crown,mikymod/crown,galek/crown