Add documentation for Orange Livebox Play TV devices (#1872)

* Add documentation for Orange Livebox Play TV devices

* Add documentation about the port config parameter

* Reword according to suggestion by @Landrash

* Update HA release version

source/_components/media_player.liveboxplaytv.markdown

@@ -0,0 +1,45 @@
+---
+layout: page
+title: "Orange Livebox Play TV"
+description: "Instructions on how to integrate a Livebox Play TV appliance into Home Assistant."
+date: 2017-01-25 07:27
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: orange.png
+ha_category: Media Player
+featured: false
+ha_release: 0.38
+ha_iot_class: "Local Polling"
+---
+
+The `liveboxplaytv` platform allows you to control [Orange Livebox Play TV appliances](https://boutique.orange.fr/internet/decodeur-tv-livebox).
+
+To add an Orange Livebox Play TV to your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+media_player:
+  - platform: liveboxplaytv
+    host: 192.168.1.3
+```
+
+Configuration variables:
+
+- **host** (*Required*): The IP or hostname of the Orange Livebox Play TV appliance.
+- **name** (*Optional*): The name to use in the frontend. Defaults to `Livebox Play TV`.
+- **port** (*Optional*): The port on which the Livebox is listening on. Defaults to 8080.
+
+## {% linkable_title Full configuration %}
+
+A full configuration example for an Orange TV appliance can look like this:
+
+```yaml
+# Example configuration.yaml entry
+media_player:
+  - platform: liveboxplaytv
+    host: 192.168.1.3
+    port: 8080
+    name: Orange Livebox Play TV
+```