Banktransfer: Save imported date into CharField, date format autodetection never works

src/pretix/plugins/banktransfer/migrations/0002_auto_20160908_2020.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2016-09-08 20:20
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('banktransfer', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bankimportjob',
+            name='state',
+            field=models.CharField(choices=[('pending', 'pending'), ('running', 'running'), ('error', 'error'), ('completed', 'completed')], default='pending', max_length=32),
+        ),
+        migrations.AlterField(
+            model_name='banktransaction',
+            name='date',
+            field=models.CharField(max_length=50),
+        ),
+        migrations.AlterField(
+            model_name='banktransaction',
+            name='import_job',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='transactions', to='banktransfer.BankImportJob'),
+        ),
+    ]