specify user deletion

I had an interesting read on http://blog.ploeh.dk/2013/04/30/rest-lesson-learned-avoid-204-responses/

What did I learn?
1. 204 seems to be a bad idea (I got that point)
2. Returning the non-existent resource sounds like a bad idea either, because it is deleted... returning it **after** we deleted it sounds like a lie. We would also have to make sure that we do not show links like `update` and `delete`, because they are not valid anymore.

One proposed solution is to send the client one level up, e.g. show it the list of users afterwards... However, I don't like that approach very much either, because it seems like unrelated information to me...

If I had to decide now, I would stay with 204, thereby violating HATEOAS, but keep in mind that this is we should consider doing better some day...