//include controllers, error controller is a special case with lower priority to catch 404s
    var controllersFolder = 'controllers';
    fs.readdir('./' + controllersFolder, function(err, files) {
        if (err) throw err;

        //top priority: controllers are called as controller(server, io)
        files.forEach(function(file) {
            file = file.replace('.js', '');

            //skip error controller
            if (file == 'errorController') return;

            //require this controller
            var controller = '../' + controllersFolder + '/' + file;
            util.debug('requiring controller: ' + controller);
            require(controller)(server, io);
        });

        //lower priority: error controller
        util.debug('requiring error controller');
        require('../controllers/errorController')(server);
    });