Create and edit views / Interface for creating and viewing trip tickets (Tickets 1071/1072)

* Scaffolding TripTickets controller
* Adding initial index, show, new and edit actions and views
* Adding several fields that were missing based on the data layout document
* Adding Ethnicity model
* Updating output of display_appointment_time helper for TripTickets#list and #show views
* Removing trip_tickets.customer_name column
* Setting up required fields, default values, and updating some form field types
Merge branch '1072-trip-tickets-create-and-edit-views'