Added migration containing the OwnerId property, specifying the user id who "owns" the dossier.
Added OwnerId property to the Dossier class.
Included the OwnerId when creating a dossier or updating a dossier.
Added OwnerId property to the Convert::ToDossier method.
When creating a user as parent, the OwnerId property will be set.
Fixed problem with not being able to create a dossier, because of anonymous usage. Fixed by signing the user in after registering (Temporary).
When managing access to a dossier, the user who is the "owner" of a dossier will not have a delete "X" behind it's name. No deletion possible.