Closes #484: Show device information (#573)

* Add model and individual option

* Add forms and views

* minor changes

netbox_topology_views/choices.py

@@ -0,0 +1,14 @@
+from utilities.choices import ChoiceSet
+
+class NodeLabelItems(ChoiceSet):
+    DEVICE_NAME = 'devicename'
+    PRIMARY_IPV4 = 'primaryipv4'
+    PRIMARY_IPV6 = 'primaryipv6'
+    OUT_OF_BAND_IP = 'outofbandip'
+
+    CHOICES = [
+        (DEVICE_NAME, 'Device Name'),
+        (PRIMARY_IPV4, 'Primary IPv4'),
+        (PRIMARY_IPV6, 'Primary IPv6'),
+        (OUT_OF_BAND_IP, 'Out-of-band IP'),
+    ]