xhj/embeded-gateway: 网关代码

xhj 4d99525703 first commit		6 月之前
..
reverse_apply	4d99525703 first commit	6 月之前
at.hpp	4d99525703 first commit	6 月之前
drop_into.hpp	4d99525703 first commit	6 月之前
foldl1.hpp	4d99525703 first commit	6 月之前
foldr1.hpp	4d99525703 first commit	6 月之前
reverse_apply.hpp	4d99525703 first commit	6 月之前
split_at.hpp	4d99525703 first commit	6 月之前
take.hpp	4d99525703 first commit	6 月之前