Implemented cascading scan, track and card deletion

ref #78

src/controllers/ScanStationController.ts

@@ -98,7 +98,7 @@ export class ScanStationController {
 		}
 		const scanController = new ScanController;
 		for (let scan of stationScans) {
-			scanController.remove(scan.id, force);
+			await scanController.remove(scan.id, force);
 		}
 
 		const responseStation = await this.stationRepository.findOne({ id: station.id }, { relations: ["track"] });