Add badge printing capabilities (#868)

Add badge printing capabilities

src/pretix/plugins/badges/migrations/0001_initial.py

@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.11 on 2018-04-16 08:04
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.base
+import pretix.plugins.badges.models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('pretixbase', '0088_auto_20180328_1217'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='BadgeItem',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('item', models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='badge_assignment', to='pretixbase.Item')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='BadgeLayout',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('default', models.BooleanField(default=True, verbose_name='Default')),
+                ('name', models.CharField(max_length=190, verbose_name='Name')),
+                ('layout', models.TextField()),
+                ('background', models.FileField(blank=True, max_length=255, null=True, upload_to=pretix.plugins.badges.models.bg_name)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='badge_layouts', to='pretixbase.Event')),
+            ],
+            options={
+                'ordering': ('-default', 'name'),
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.AddField(
+            model_name='badgeitem',
+            name='layout',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='badges.BadgeLayout'),
+        ),
+    ]