Added function to cleanup inventory (mine grew to 1.5GB) but no automatism yet

app/src/main/java/ch/dissem/apps/abit/service/BitmessageService.java

@@ -33,11 +33,11 @@ import static ch.dissem.apps.abit.notification.NetworkNotification.NETWORK_NOTIF
  * onPerformSync().
  */
 public class BitmessageService extends Service {
-    private NetworkNotification notification = null;
     private static BitmessageContext bmc = null;
-
     private static volatile boolean running = false;
 
+    private NetworkNotification notification = null;
+
     public static boolean isRunning() {
         return running && bmc.isRunning();
     }