Added Nanoleaf Aurora Light documentation (#5018)

* Added Nanoleaf Aurora Light documentation

* ✏️ Tweaks

source/_components/light.nanoleaf_aurora.markdown

@@ -0,0 +1,52 @@
+---
+layout: page
+title: "Nanoleaf Aurora Light Panel"
+description: "Instructions how to integrate Nanoleaf Aurora Light Panels into Home Assistant."
+date: 2018-01-04 20:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: nanoleaf_aurora_light.png
+ha_category: Light
+ha_iot_class: "Local Polling"
+featured: false
+ha_release: 0.67
+---
+
+### {% linkable_title Configuration Sample %}
+
+To enable the Aurora lights, add the following lines to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+light:
+  - platform: aurora
+    host: 192.168.1.10
+    token: xxxxxxxxxxxxxxxxxxxxx
+```
+
+{% configuration %}
+host:
+  description: IP address or host-name of the device, e.g., 192.168.1.10.
+  required: true
+  type: string
+token:
+  description: The *auth* token that you get via *POST* to */api/v1/new*
+  required: true
+  type: string
+name:
+  description: Name of the component, make this unique if you have multiple Light Panels
+  required: false
+  type: string
+  default: Aurora
+{% endconfiguration %}
+
+### {% linkable_title Getting The Auth Token %}
+
+1. Make sure that your Nanoleaf Aurora Panel is fully patched (as of the time of writing the latest version was 2.2.0)
+2. Hold down the *ON* button on the Panel for 5 seconds; the LED will start flashing
+3. Issue a *POST* request to the API endpoint, e.g., via `$ curl -i -X POST http://192.168.1.155:16021/api/v1/new`
+4. The output should include the auth token like *{"auth_token":"xxxxxxxxxxxxxxxxxxxxx"}*, copy the resulting token into your configuration
+
+If you get a 403 Forbidden message, you probably did not press the *ON* button long enough. The time-frame to get a valid token is only 30 seconds, so you have to be quick to issue the curl request.