Create an advanced Authentication module

[Maxhy]

Current Authentication module is too simple. A new auth module should be created with support of the following features:

• Users: firstname, lastname, email, enabled, optional groups, optional schedules, optional validity start, optional validity end
• Groups: name, optional schedules
• Schedules: name, days, hours
• Cards: name, cardid, enabled, user, optional schedules, optional validity start, optional validity end

We should also support holidays and 3*8 organization.

[xaqq]

The auth-file module has been patched to support those requirements except for holidays and 3x8 which will eventually be implemented later.