Add django constance to thirdpart to void dependency

thirdpart/constance/backends/database/migrations/0001_initial.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import picklefield.fields
+
+
+class Migration(migrations.Migration):
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name='Constance',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', primary_key=True,
+                                        auto_created=True, serialize=False)),
+                ('key', models.CharField(unique=True, max_length=255)),
+                ('value', picklefield.fields.PickledObjectField(editable=False)),
+            ],
+            options={
+                'verbose_name': 'constance',
+                'verbose_name_plural': 'constances',
+                'db_table': 'constance_config',
+            },
+            bases=(models.Model,),
+        ),
+    ]