去除提示，用户应该知道自己要干什么
update nand_part increase the first partition(bootloader) from 1024 to
2048
update u-boot on a10 nand, this speeds up the boot process, this u-boot
is compiled from https://github.com/mmplayer/u-boot-sunxi/tree/sunxi-nand
update version no
fix tips
update u-boot.img
try to fix "Hash Sum mismatch" error when do apt-get update