Add setExample before action

[gaand]

and 404 if not found if action is create or update, e.g:

Example.findOne({_id: req.params.id, _owner: req.current_user.id}).then(...).catch(...)

findById for show.

[raq929]

Would setExample be defined in the controllers/examples.js, or in concerns/?

[gaand]

In the controller.