参考网址:http://blog.youkuaiyun.com/itlsx/article/details/49981459
http://blog.youkuaiyun.com/perfect666dream/article/details/70599685
命令:
npm install -g gulp gulp-load-plugins gulp-rename gulp-uglify gulp-minify-css gulp-minify-html gulp-jshint gulp-concat gulp-less gulp-sass gulp-imagemin gulp-livereload