Add authorisation models.

Add EventAuthorisation model + migrations

Add authorised property to Event.

Add appropriate tests

RIGS/migrations/0025_eventauthorisation.py

@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('RIGS', '0024_auto_20160229_2042'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='EventAuthorisation',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('email', models.EmailField(max_length=254)),
+                ('name', models.CharField(max_length=255)),
+                ('uni_id', models.CharField(max_length=10, null=True, verbose_name=b'University ID', blank=True)),
+                ('account_code', models.CharField(max_length=50, null=True, blank=True)),
+                ('po', models.CharField(max_length=255, null=True, verbose_name=b'purchase order', blank=True)),
+                ('amount', models.DecimalField(verbose_name=b'authorisation amount', max_digits=10, decimal_places=2)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('event', models.ForeignKey(related_name='authroisations', to='RIGS.Event')),
+            ],
+        ),
+    ]