add border-cut to block element

Signed-off-by: Junliang Huang <i@jhuang.me>
add displayfeatures to ga

Signed-off-by: Junliang Huang <i@jhuang.me>
Merge branch 'master' into border-cut

Signed-off-by: Junliang Huang <i@jhuang.me>
add autoscroll utility

Signed-off-by: Junliang Huang <i@jhuang.me>
and home cover feature

Signed-off-by: Junliang Huang <i@jhuang.me>