First rough pass at adding customer orders model and some views/templates/admin stuff for same

InvenTree/stock/migrations/0011_auto_20180417_2127.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11 on 2018-04-17 11:27
+from __future__ import unicode_literals
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0010_stockitem_build'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockitem',
+            name='status',
+            field=models.PositiveIntegerField(choices=[(10, 'OK'), (50, 'Attention needed'), (55, 'Damaged'), (60, 'Destroyed')], default=10, validators=[django.core.validators.MinValueValidator(0)]),
+        ),
+    ]