* Now uses detailed permissions
* BACKWARDS INCOMPATIBLE API CHANGES
* ResourceMixin.users_for_perm() accepts additional parameters group_ids, and user_ids
to limit the amount of results if needed
* User.permissions, Resource.perms_for_user, Resource.direct_perms_for_user,
Resource.group_perms_for_user, Resource.users_for_perm_detailed, Resource.users_for_perm
now return list of detailed PermissionTuple's instead simple [id, perm_name] pairs
this will break your application
You can use ziggurat_foundations.utils.permission_to_04_acls() to convert
the new tuples to pre 0.5 format
2015-02-18
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