Report job error states in the API

(to keep consistent with the rails implementation)

fix #349
fix #356

django/allgo/api/v1/views.py

@@ -34,7 +34,7 @@ class APIJobView(JobAuthMixin, View):
 
             response = {
                 job.id: files,
-                "status": job.get_state_display().lower(),
+                "status": "done" if job.result==Job.SUCCESS else job.status.lower(),
             }
             return JsonResponse(response)
         except Job.DoesNotExist as e: