Add a missing migrations on billing (from 41baa7cc)

coin/billing/migrations/0003_auto_20150221_2226.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('billing', '0002_auto_20141002_0204'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='invoice',
+            name='validated',
+            field=models.BooleanField(default=False, help_text='Once validated, a PDF is generated and the invoice cannot be modified', verbose_name='valid\xe9e'),
+            preserve_default=True,
+        ),
+    ]