Hotfix comments migrations

comments/migrations/0010_auto_20170216_1831.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.3 on 2017-02-16 17:31
+from __future__ import unicode_literals
+
+import comments.behaviors
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('comments', '0009_auto_20170212_2025'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='comment',
+            name='author',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='scipost.Contributor'),
+        ),
+        migrations.AlterField(
+            model_name='comment',
+            name='file_attachment',
+            field=models.FileField(blank=True, upload_to='uploads/comments/%Y/%m/%d/', validators=[comments.behaviors.validate_file_extension, comments.behaviors.validate_max_file_size]),
+        ),
+    ]