Add doc for Opple light (#6328)

* Add doc for Opple light

* Update light.opple.markdown

* review fix

* review fix

source/_components/light.opple.markdown

@@ -0,0 +1,42 @@
+---
+layout: page
+title: "Opple Light"
+description: "Instructions on how to integrate Opple lights into Home Assistant."
+date: 2018-09-21 10:40
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: opple.png
+ha_category: Light
+ha_release: "0.80"
+ha_iot_class: "Local Polling"
+---
+
+
+The `opple` light platform allows you to control the state of your Opple smart light.
+
+The platform supports all Opple lights with Wi-Fi support or lights that can be controlled by the App.
+
+To use your Opple light in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+light:
+  - platform: opple
+    name: LIGHT_NAME
+    host: IP_ADDRESS
+```
+
+{% configuration %}
+name:
+  description: The name to use when displaying this light.
+  required: false
+  type: string
+  default: opple light
+host:
+  description: "The IP address of your Opple light, eg. `192.168.0.21`."
+  required: true
+  type: string
+{% endconfiguration %}
+