archlinux : bluetooth keyboard 蓝牙键盘配置

https://wiki.archlinux.org/index.php/Bluetooth_keyboard

http://superuser.com/questions/908462/getting-bluetooth-to-work-in-arch-linux

https://wiki.archlinux.org/index.php/Bluetooth_mouse

http://www.linuxforums.org/forum/hardware-peripherals/126054-enable-bluetooth-keyboard-boot.html