安装butterfly主题前安装的依赖：

npm install --save hexo-renderer-jade hexo-generator-feed hexo-generator-sitemap hexo-browsersync hexo-generator-archive

安装hexo-deployer-git:

npm install --save hexo-deployer-git

更改_config.yml文件：

deploy
  type: git
  repository: git@github.com:YOUR_ID/YOUR_ID.github.io.git
  branch: master