Added 'URL' field to company

InvenTree/company/migrations/0004_company_url.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.12 on 2018-04-24 08:01
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('company', '0003_auto_20180423_1117'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='company',
+            name='URL',
+            field=models.URLField(blank=True, help_text='Link to external company information'),
+        ),
+    ]