Initial work on cable paths (WIP)

netbox/dcim/managers.py

@@ -0,0 +1,8 @@
+from django.contrib.contenttypes.models import ContentType
+from django.db.models import Manager
+
+
+class CablePathManager(Manager):
+
+    def create_for_endpoint(self, endpoint):
+        ct = ContentType.objects.get_for_model(endpoint)