Autocomplete from GIS list of CRSs..

..using django-autocomplete-light, in both the admin area and the
end-user form

Closes #32

apps/map/migrations/0051_auto_20180404_0024.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.6 on 2018-04-04 00:24
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('map', '0050_auto_20180402_1237'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='casestudy',
+            name='coordinate_reference_system',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='gis.PostGISSpatialRefSys'),
+        ),
+    ]