feature: root option allows array of strings

demo/express/index.js

@@ -1,20 +1,6 @@
-var express = require('express');
-var app = express();
-var Liquid = require('..');
-
-var engine = Liquid({
-    root: __dirname,  // for layouts and partials
-    extname: '.liquid'
-});
-
-app.engine('liquid', engine.express()); // register liquid engine
-app.set('views', __dirname);            // specify the views directory
-app.set('view engine', 'liquid');       // set to default
-
-app.get('/', function (req, res) {
-    res.render('foo');
-});
+const app = require('./app.js');
 
 app.listen(3000, function () {
     console.log('Example app listening on port 3000!');
 });
+