Fix allowing kue app to be hosted as child of another parent express app

[estien]

With this added slash in the base path redirect, the kue app performs correct redirects if it is hosted as part of a parent express app, on its own dedicated path, like so:

var app = require('express')(); // parent express app
app.use('/kueapp', require('kue').app); // we want the kue UI to be available on the 'kueapp' subpath
app.listen(1337); // the kue app is now available on http://localhost:1337/kueapp

This fixes the current failing behavior, as a redirect without the slash sends the user to http://localhost:1337/kueappactive, which returns 404.

[vhain]

i think app.baseUrl is better than app.path()

see #397

[lchenay]

+1

[behrad]

it was formerly
(app.path() === '/') ? res.redirect('/active') : res.redirect('active');
and I think we should use baseUrl instead as @vhain said