increased comic file name lenght to 100 chars

fixed finding the file extension.

comic/migrations/0007_auto_20150626_1820.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('comic', '0006_auto_20150625_1411'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='setting',
+            name='name',
+            field=models.CharField(unique=True, max_length=100),
+        ),
+    ]