update events_controller to use strong_parameters. Add tests for nested parameters for event_categories and event_choices
update expense_group to use strong_parmeters. Update tests for event_choice and event_configuration to use translations properly
update expense_item to use strong_parameters
update external_result to use strong_parameters
remove empty assets in an attempt to speed up development environment responsiveness
update import_results to use strong-parameters
update judges_controller to use Strong_parameters
update lane_assignments to use strong_parameters
add registrant_expense_items_controller_spec, and convert registrant_expense_item to use strong_parameters
don't show taxes if the item is free
Add debug to payments notification