xhj/embeded-gateway: 网关代码

xhj 4d99525703 first commit		6 月之前
..
cla	4d99525703 first commit	6 月之前
env	4d99525703 first commit	6 月之前
argument.hpp	4d99525703 first commit	6 月之前
argument_factory.hpp	4d99525703 first commit	6 月之前
errors.hpp	4d99525703 first commit	6 月之前
finalize.hpp	4d99525703 first commit	6 月之前
fwd.hpp	4d99525703 first commit	6 月之前
modifier.hpp	4d99525703 first commit	6 月之前
parameter.hpp	4d99525703 first commit	6 月之前