Update README.md

Author: jfbrennan

README.md

@@ -95,7 +95,7 @@ var exphbs  = require('express-handlebars');
 
 var app = express();
 
-app.engine('handlebars', exphbs({defaultLayout: 'main'}));
+app.engine('handlebars', exphbs());
 app.set('view engine', 'handlebars');
 
 app.get('/', function (req, res) {
@@ -124,6 +124,8 @@ The main layout is the HTML page wrapper which can be reused for the different v
 </html>
 ```
 
+You can use a different name for the default layout when registering Handlebars by passing the `defaultLayout` option, e.g.  `exphbs({defaultLayout: 'name'})`.
+
 **views/home.handlebars:**
 
 The content for the app's home view which will be rendered into the layout's `{{{body}}}`.