Fix localversion in defconfig

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Add copyright and licence

Signed-off-by: Jerry <jerrylin.lxf@gmail.com>
Correct README spelling mistakes

Signed-off-by: Jerry <jerrylin.lxf@gmail.com>
Add NEXT section in README

Signed-off-by: Xiaofeng Lin <jerrylin.lxf@gmail.com>