xhj/embeded-gateway: 网关代码

xhj 4d99525703 first commit		6 月之前
..
accumulators	4d99525703 first commit	6 月之前
parameters	4d99525703 first commit	6 月之前
accumulator_base.hpp	4d99525703 first commit	6 月之前
accumulator_concept.hpp	4d99525703 first commit	6 月之前
accumulator_set.hpp	4d99525703 first commit	6 月之前
depends_on.hpp	4d99525703 first commit	6 月之前
external.hpp	4d99525703 first commit	6 月之前
extractor.hpp	4d99525703 first commit	6 月之前
features.hpp	4d99525703 first commit	6 月之前