Add race and directory export/import

README.md

@@ -34,6 +34,9 @@ JMK RB RaceController is an RC timing and race-control system with support for s
 - UI separation:
   - `Event` = sponsor events with shared cars/transponders
   - `Race Setup` = competition races with personal driver transponders
+- Storage/import tools:
+  - full race-data export/import for backup or moving to another machine
+  - directory export/import for only classes, drivers and cars
 - Race Setup includes:
   - grouped `Participants` and `Teams` sections in `Manage`
   - a four-step `Create Race Wizard` for new races