Scaffold a simple form for adding new events.
[add-event] Compute the slug from the event name.
[add-event] Allow to add a new venue for the event.
[add-event] Move optional info to separate well.
[add-event] Extract form field template.
[add-event] Add client-side validation for ex versus new venue.
[add-event] Use sirtrevor for event description - WIP.
[add-event] Add edit event form as well.
[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.
Merge branch 'add-event-form'

Conflicts:
	events/models.py
[add-event] Add placeholders for date/time input fields.