Gulp: Images minificaiton task

gulpfile.js

/**
 * Images
 *
 * Look at src/images, optimize the images and send them to the appropriate place
*/
gulp.task('images', function() {

// Add the newer pipe to pass through newer images only
	return 	gulp.src(['./assets/img/raw/**/*.{png,jpg,gif}'])
				.pipe(newer('./assets/img/'))
				.pipe(rimraf({ force: true }))
				.pipe(imagemin({ optimizationLevel: 7, progressive: true, interlaced: true }))
				.pipe(gulp.dest('./assets/img/'))
				.pipe( notify( { message: 'Images task complete', onLast: true } ) );
});