Added api_key database migrations. Also includes other outstanding migrations:

- Change Meta options on invoice
    - Add field api_key to profile
    - Alter field collector on event
    - Alter field initials on profile

RIGS/migrations/0021_auto_20150420_1155.py

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('RIGS', '0020_auto_20150303_0243'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='invoice',
+            options={'ordering': ['-invoice_date'], 'permissions': (('view_invoice', 'Can view Invoices'),)},
+        ),
+        migrations.AddField(
+            model_name='profile',
+            name='api_key',
+            field=models.CharField(max_length=40, null=True, editable=False, blank=True),
+            preserve_default=True,
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='collector',
+            field=models.CharField(max_length=255, null=True, verbose_name=b'Collected By', blank=True),
+            preserve_default=True,
+        ),
+        migrations.AlterField(
+            model_name='profile',
+            name='initials',
+            field=models.CharField(max_length=5, unique=True, null=True),
+            preserve_default=True,
+        ),
+    ]