Documentation for Uptime Robot sensor (#5437)

* Initial documentation for Uptime Robot

* Added sidebar

* quote for title

* trigger netlify build, it faild due to timeout.

* trigger netlify build, it faild due to timeout again.

* Converted to binary_sensor

* convert to binary_sensor

* Update binary_sensor.uptimerobot.markdown

* Update binary_sensor.uptimerobot.markdown

source/_components/binary_sensor.uptimerobot.markdown

@@ -0,0 +1,35 @@
+---
+layout: page
+title: "Uptime Robot"
+description: "Instructions on how to set up Uptime Robot within Home Assistant."
+date: 2018-05-29 21:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: uptimerobot.png
+ha_category: Binary Sensor
+ha_release: "0.72"
+ha_iot_class: "Cloud Polling"
+---
+
+The `uptimerobot` binary_sensor platform allows you get the status for all of your monitors from your account on [Uptime Robot.]( https://uptimerobot.com)
+
+## Example for `configuration.yaml` :
+
+```yaml
+binary_sensor:
+  - platform: uptimerobot
+    api_key: u432898-d2507e493b31217e6c64fd35
+```
+
+{% configuration %}
+api_key:
+  description: Your Uptime Robot API key.
+  required: true
+  type: string
+{% endconfiguration %}
+
+All the data will be fetch from [Uptime Robot](https://uptimerobot.com).
+
+To get your API key, go to [My Settings](https://uptimerobot.com/dashboard#mySettings) on the Uptime Robot website, at the bottom you will find your "Main API Key".