xhj/embeded-gateway: 网关代码

xhj 4d99525703 first commit		6 月之前
..
count.hpp	4d99525703 first commit	6 月之前
fraction.hpp	4d99525703 first commit	6 月之前
is_thread_safe.hpp	4d99525703 first commit	6 月之前
mean.hpp	4d99525703 first commit	6 月之前
ostream.hpp	4d99525703 first commit	6 月之前
sum.hpp	4d99525703 first commit	6 月之前
weighted_mean.hpp	4d99525703 first commit	6 月之前
weighted_sum.hpp	4d99525703 first commit	6 月之前