add package dependencies

src/c3nav/mapdata/migrations/0002_package_depends.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.9 on 2016-09-04 12:20
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mapdata', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='package',
+            name='depends',
+            field=models.ManyToManyField(to='mapdata.Package'),
+        ),
+    ]