Initial documentation for Ryobi cover (#5424)

* Initial documentation for Ryobi cover

* Update 'ha_release', configuration style and setup

source/_components/cover.ryobi_gdo.markdown

@@ -0,0 +1,59 @@
+---
+layout: page
+title: "Ryobi GDO Cover"
+description: "Instructions on how to integrate Ryobi Garage Door Opener (RyobiGDO) within Home Assistant."
+date: 2018-04-22 09:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: ryobi.png
+ha_category: Cover
+ha_release: 0.71
+ha_iot_class: "Cloud Polling"
+---
+
+
+The `ryobi_gdo` cover platform lets you control [Ryobi](https://www.ryobitools.com/gdo/) garage door opener through Home Assistant.
+
+## {% linkable_title Setup %}
+
+In order to be able to use your Ryobi garage door opener, you will have to get the DEVICE_ID_OF_YOUR_COVER (one for each garage door).
+
+The DEVICE_ID_OF_YOUR_COVER can be retrieved using `curl`, simply use your username and password using the following example. Your `DEVICE_ID_OF_YOUR_COVER` will be `varName`:
+
+```bash
+$ curl -H "Content-Type: application/json" -X GET \
+    -d '{"username":"RYOBIGDO_USERNAME","password":"RYOBIGDO_PASSWORD"}' \
+    https://tti.tiwiconnect.com/api/devices
+```
+
+## {% linkable_title Configuration %}
+
+To enable Ryobi covers in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+cover:
+  - platform: ryobi_gdo
+    username: RYOBIGDO_USERNAME
+    password: RYOBIGDO_PASSWORD
+    device_id:
+      - DEVICE_ID_OF_YOUR_COVER#1
+      - DEVICE_ID_OF_YOUR_COVER#2
+```
+
+{% configuration %}
+username:
+  description: Your RyobiGDO account username.
+  required: true
+  type: string
+password:
+  description: Your RyobiGDO account password.
+  required: true
+  type: string
+device_id:
+  description: List of your doors.
+  required: true
+  type: list
+{% endconfiguration %}