Access Profile, User and Cards

[xaqq]

Implements base code to handle "Access Profile". A profile
holds the base configuration information about whether or not a user
will be granted access.
The profile control which days / hours the user has access. It also
controls what door the user has access to.

A user can have multiple access card, but only one access profile.
An access card maps to a user. The user's profile is then used to
grant or deny access.
Temporary access card also exists. Those maps directly to access profile.

A group can map to an access profile.
A user can be part of a group. If the user has a specific access
profile, his group profile shall be ignored.

This looks like this:

             Profile <------ user <------ cards
                       <------ temporary cards.
                       <------ group <----- user

This is related to authentications modules: mapping will vary (LDAP
backend to map user to group, SQL backend that holds acess profile
info, group membership, etc).

The control code should be reusable once the proper access profile,
group, user, and cards are correctly mapped.

[xaqq]

Multi group are supported for one user.
Single user permissions + group permissions arent yet.

[xaqq]

Temporary access cards are postponed until later.
Groups and user permissions works.