Don't allow fields to be blank.

This is totes essential information for the BCBC.

bikeshop_project/registration/migrations/0003_auto_20160327_0620.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2016-03-27 06:20
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('registration', '0002_member_email_consent'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='member',
+            name='date_of_birth',
+            field=models.DateField(null=True),
+        ),
+        migrations.AlterField(
+            model_name='member',
+            name='post_code',
+            field=models.CharField(max_length=20, null=True),
+        ),
+    ]