Added private_key field to UserHostingkey model, some html updates

hosting/migrations/0041_userhostingkey_private_key.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.4 on 2017-07-06 09:06
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('hosting', '0040_hostingplan'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='userhostingkey',
+            name='private_key',
+            field=models.FileField(blank=True, upload_to='private_keys'),
+        ),
+    ]