Add forgotten migration

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/billing/migrations/0010_auto_20160210_1407.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-02-10 14:07
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('billing', '0009_remove_billing_trial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='invoice',
+            name='currency',
+            field=models.IntegerField(choices=[(0, 'EUR'), (1, 'mBTC')], default=1),
+        ),
+        migrations.AlterField(
+            model_name='invoice',
+            name='payment',
+            field=models.FloatField(),
+        ),
+    ]