gulp/tasks/docs/images.js
var newer = require('gulp-newer');
var gulp = require('gulp');
var imagemin = require('gulp-imagemin');
gulp.task('docs:images', function() {
var dest = './docs/img';
return gulp.src('./lib-docs/img/**/*')
.pipe(newer(dest)) // Ignore unchanged files
.pipe(gulp.dest(dest));
});