Multi users accounts

[korbe@…]

Now, we have only one user account for use and administer the Fonera. It would be also good to define other users who have no right to configure the Fonera (no admin rights), but the right to use the features and plugins that the administrator has authorised them to using. Users would also their own storage space on a USB drive plugged (no user could access to the storage space of another user except the administrator) and also an access to a common storage area for all users where they can delete only what they have added (except for the admin who can delete everything).