the example login app update with express 4.4.5 and now seperate middlewares

Hi Jared.
Thanks for the awesome facebook plugin. I used it in my project. I just noticed that the example login app has an old version of express. As the new version uses separate middlewares, I've updated the example.

The changes are
* Removal of the deprecated app.configure() and app.use(app.router)
* Use now separate middleware modules, morgan, express-session, body-parser, cookie-parser, and method-override