MAINT: Add new collection types (#56)

Fixes #50

ccdb/collections_ccdb/migrations/0008_DATA_new_collection_type_values.py

@@ -0,0 +1,23 @@
+from django.db import migrations
+from django.forms import modelform_factory
+
+
+class Migration(migrations.Migration):
+    def migrate(apps, schema_editor):
+        CollectionType = apps.get_model('collections_ccdb', 'CollectionType')
+        CollectionTypeForm = modelform_factory(CollectionType,
+                                               fields=('name',))
+        for ct in ['Juvenile', 'Mixed Ages']:
+            form = CollectionTypeForm(dict(name=ct))
+            if form.is_valid():
+                CollectionType.objects.create(**form.cleaned_data)
+            else:
+                print('collection type', form.errors.as_data())
+
+    dependencies = [
+        ('collections_ccdb', '0007_collection_measurements'),
+    ]
+
+    operations = [
+        migrations.RunPython(migrate),
+    ]