Added missing migrations.
Added a field to allow for future alternate payment methods.
Clarified what characters are allowed in discount code field.
Corrected item display on records page.
Added filtering by discounts on event summary page.
Replaced references to event dashboard with event summary.
Cleaned up event summary page.
Corrected event root routing.
Added links from starting event page directly to item/discount creation.
No more horz scrolling ever.

Resolves #132
Added missing discount code migration.
Renamed EventPerson to Order.
Renamed attendee files to orders.
Corrected event item listing to actually limit items listed to items for the event.
Renamed records view to 'offer summary'.
Added basic order filtering view.
Renamed records template.
Switched over some trailing references to event person.
Added basic order detail view for organizers.
Condensed display of order data on organizer-facing detail page.