[Starts #44167271]
Ensures that there is a user object for the view

[Completes #44340359]
Allows to attach life events to characters

It's possible to make a POST request to
/characters/:character_id/life_events/:event_type/:id to create a new
life event.
It's also possible to remove a life event by making a DELETE request to
/characters/:character_id/life_events/:id
Merge pull request #29 from ekampp/features/educations

[Completes #44167271 #44340359] Allows attaching educations (via life events) to the character