Add copy of Discourse-Auth app,

Probably should split into separate repo at some point, but committing here so I don't lose it

DiscourseAuth/migrations/0004_discourseuserlink.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+from django.conf import settings
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('DiscourseAuth', '0003_auto_20170126_1621'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='DiscourseUserLink',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('discourse_user_id', models.IntegerField()),
+                ('django_user', models.OneToOneField(to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]