gulp.task( 'vendor-js', function() {
	return gulp.src( [ 'dev/js/vendor/*.js' ] )
		.pipe( sourcemaps.init() )
		.pipe( concat( 'application-vendor.js' ) )
		.pipe( uglify() )
		.pipe( sourcemaps.write() )
		.on( 'error', handleError )
		.pipe( gulp.dest( proj_dir + '/assets/js' ) )
		;
} );