Ability to delete part

- Provides confirmation form
- Shows the flow-on effects (model.CASCADE) from deleting this part
- Bootstrap makes it prettyful

InvenTree/part/migrations/0013_auto_20180414_2238.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11 on 2018-04-14 22:38
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0012_auto_20180414_1032'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='part',
+            name='name',
+            field=models.CharField(max_length=100, unique=True),
+        ),
+        migrations.AlterUniqueTogether(
+            name='part',
+            unique_together=set([]),
+        ),
+    ]