Add referral help text.

course_discovery/apps/core/migrations/0007_auto_20160510_2017.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0006_user_referral_tracking_id'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='referral_tracking_id',
+            field=models.CharField(max_length=255, verbose_name='Referral Tracking ID', default='affiliate_partner'),
+        ),
+    ]

course_discovery/apps/core/models.py

@@ -9,7 +9,7 @@ from guardian.mixins import GuardianUserMixin
 class User(GuardianUserMixin, AbstractUser):
     """Custom user model for use with OpenID Connect."""
     full_name = models.CharField(_('Full Name'), max_length=255, blank=True, null=True)
-    referral_tracking_id = models.CharField(_(''), max_length=255, default='affiliate_partner')
+    referral_tracking_id = models.CharField(_('Referral Tracking ID'), max_length=255, default='affiliate_partner')
 
     @property
     def access_token(self):