Implemented cascading scan, track and card deletion

ref #78

src/controllers/TrackController.ts

@@ -94,9 +94,9 @@ export class TrackController {
 		if (trackStations.length != 0 && !force) {
 			throw new TrackHasScanStationsError();
 		}
-		const scanController = new ScanStationController;
+		const stationController = new ScanStationController;
 		for (let station of trackStations) {
-			scanController.remove(station.id, force);
+			await stationController.remove(station.id, force);
 		}
 
 		await this.trackRepository.delete(track);