Added partial for edit and delete on a event to integrate the possibility to view -or not- based on the user -creator of the event, admin
app/views/events/_links.html.erb

Edited single event partial and event show page to integrate the partial
app/views/events/_single_event.html.erb
app/views/events/show.html.erb
Updated tests to match new classes, and to test with different types of users (admin, creator and random user)
spec/factories/events.rb
spec/features/comments_spec.rb
spec/features/events_spec.rb