README.md: add Arch Linux (AUR) instructions
README.md: add Arch Linux (AUR) instructions
mikymod/crown,dbartolini/crown,dbartolini/crown,mikymod/crown,galek/crown,galek/crown,dbartolini/crown,mikymod/crown,galek/crown,mikymod/crown,dbartolini/crown,galek/crown