git-down-repo：为任何网址下载git-repo

git-down-repo 开始 npm install git-down-repo -g // 安装全局 // test gitdown https://github.com/hua1995116/webchat // 下载整个仓库（默认master） gitdown https://github.com/hua1995116/webchat dev // 下载某个仓库的dev分支 gitdown https://github.com/hua1995116/webchat/tree/master/config // 下载仓库某个文件夹 gitdown https://github.com/hua1995116/webchat/blob/master/config/dev.env.js // 下载某个文件 gitdown https://github.com/hua1995116/webchat/blob/master/config/dev.env.js https://github.com/hua1995116/webpack-plugin-inner-script/blob/m