"sign-in" module renamed to "auth"
Forgot to load the configuration and the manager module
Authentication module started

A callback URL has also been added to the configuration file
Renamed the "routes" to "controllers"

Don't like the way Express named these, for me it's controllers, not
routes.
Few changes in the Manager module

The submodules are now contained in a "submodules" object
Session middleware added for the "auth" module