update readme

Signed-off-by: xiehuc <xiehuc@gmail.com>
add authors

Signed-off-by: xiehuc <xiehuc@gmail.com>
may fix a group list loading issue

Signed-off-by: xiehuc <xiehuc@gmail.com>
set group timeout longger

Signed-off-by: xiehuc <xiehuc@gmail.com>