1. Made location optional, 2. Added multicountry select option, 3.

Improved form labels, help texts and templates.

dav_events/migrations/0009_auto_20180207_1118.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.9 on 2018-02-07 11:18
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dav_events', '0008_auto_20180129_1355'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='event',
+            name='location',
+            field=models.CharField(blank=True, max_length=250),
+        ),
+    ]