App.js changed for tutorial project

app.js

var error = require('./lib/ErrorHandler');

app.configure('development', function(){
  //app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
	app.use(error({ showMessage: true, dumpExceptions: true, showStack: true, logErrors: __dirname + '/log/error_log' }));
});

app.configure('production', function(){
  //app.use(express.errorHandler()); 
	app.use(error());
});

/* ... */

// Example error pages
app.get('/ErrorExample', function(req, res, next){
	next(new Error('keyboard cat!')); // trigger an error
});

app.get('/ErrorExample2', function(req, res){
	res.render('404.jade'); // force an error.. we did not set the title
});