增加富文本的 xss 过滤

problem/migrations/0008_auto_20150922_1702.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import utils.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('problem', '0007_remove_problem_last_update_time'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='problem',
+            name='description',
+            field=utils.models.RichTextField(),
+        ),
+    ]