[add-event] Set author on new events.
[add-event] Render SirTrevor Text and List to html upon save.
[edit-event] Rename the template file.
[add-event] Add admin menu in the detail view.
[add-event] Add server-side permission validation.
[edit-event] Redirect to the event after edit.
[add-event] Adjust sirtrevor editor font size.
[add-event] UX: help_texts, form explanation, validation.
[add-event] Add trevorise_events command for representation conversion.
[add-event] Fix date-based lookup for UpdateEvent view.