facts: don't require nickmask in admin form

dr_botzo/facts/migrations/0005_auto_20150814_1653.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('facts', '0004_fact_time'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='fact',
+            name='nickmask',
+            field=models.CharField(default='', max_length=200, blank=True),
+        ),
+    ]

dr_botzo/facts/models.py

@@ -55,7 +55,7 @@ class Fact(models.Model):
 
     fact = models.TextField()
     category = models.ForeignKey(FactCategory)
-    nickmask = models.CharField(max_length=200, default='')
+    nickmask = models.CharField(max_length=200, default='', blank=True)
     time = models.DateTimeField(auto_now_add=True)
 
     objects = FactManager()