Add comment field to Orders

refs #177

src/pretix/base/migrations/0026_order_comment.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.8 on 2016-08-12 08:21
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0025_auto_20160802_2202'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='order',
+            name='comment',
+            field=models.TextField(blank=True, help_text='The text entered in this field will not be visible to the user and is available for your convenience.', verbose_name='Comment'),
+        ),
+    ]