var app, base, concat, directory, gulp, gutil, hostname, path, refresh, sass, uglify, del, connect, autoprefixer, babel; var autoPrefixBrowserList = ['last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4']; gulp = require('gulp'); gutil = require('gulp-util'); concat = require('gulp-concat'); uglify = require('gulp-uglify'); sass = require('gulp-sass'); connect = require(