add README

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
add external storage class

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
add write bluedroid config file to sdcard

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
add TODO list

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
handle 4-color key in remote control

Signed-off-by: Fudong Bai <fudongbai@gmail.com>