Auto delete stock items when they are depleted

InvenTree/stock/migrations/0015_stockitem_delete_on_deplete.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2 on 2019-05-09 12:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0014_auto_20190508_2332'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='stockitem',
+            name='delete_on_deplete',
+            field=models.BooleanField(default=True, help_text='Delete this Stock Item when stock is depleted'),
+        ),
+    ]