Path ordering

Properly handle ordering in ElementPath

arkindex/documents/migrations/0016_auto_20180704_1103.py

+# Generated by Django 2.0 on 2018-07-04 11:03
+
+import arkindex.project.fields
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('documents', '0015_corpus'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='elementpath',
+            name='path',
+            field=arkindex.project.fields.ArrayField(base_field=models.UUIDField(), size=None),
+        ),
+    ]