Refs #105 -- Variation support for vouchers

src/pretix/base/migrations/0016_voucher_variation.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-03-20 10:14
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0015_auto_20160312_1924'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='voucher',
+            name='variation',
+            field=models.ForeignKey(blank=True, help_text='This variation of the product select above is being used.', null=True, on_delete=django.db.models.deletion.CASCADE, related_name='vouchers', to='pretixbase.ItemVariation', verbose_name='Product variation'),
+        ),
+    ]