Feature Request: Support derby types other than pinewood

[dchurch315]

If would be nice if the UI could use a variable for the race vehicle type - that way you could put 'rocket' in Settings (or when creating the database) for Space Derbies, 'car' for Pinewood derbies and so on. We use this software for all the races each year and oftentimes our volunteers get confused when reading standings from the screen and say car instead of rocket or boat.