gulp自动化项目构建，自动化文件拷贝、压缩图片、css、js，less语法糖编译、包括文件修改watch实时监控等等。只要你喜欢，上百个自动化工具插件供你玩耍。
Gulp.js is an old but popular site building tool that automates various repetitive development tasks in web development, such as compiling Sass, minifying JavaScript, and optimizing images.
