Add Google Domains component (#3739)

* Add Google Domains component

* Add Google Domains image

* Add timeout to Google Domains component

* Update google_domains.markdown

* Update google_domains.markdown

source/_components/google_domains.markdown

@@ -0,0 +1,46 @@
+---
+layout: page
+title: "Google Domains"
+description: "Keep your computer registered with the Google Domains dynamic DNS."
+date: 2017-10-23 12:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: google_domains.png
+ha_category: Utility
+featured: false
+ha_release: 0.57
+---
+
+With the Google Domains component you can keep your Google Domains record up to date.
+
+To use the component in your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+google_domains:
+  domain: subdomain.domain.com
+  username: abc123
+  password: xyz345
+```
+
+{% configuration binary_sensor.template %}
+  domain:
+    description: Your FQDN.
+    required: true
+    type: string
+  username:
+    description: The generated username for this DDNS record.
+    required: true
+    type: string
+  password:
+    description: The generated password for this DDNS record.
+    required: true
+    type: string
+  timeout
+    description: Timeout (in seconds) for the API calls.
+    required: false
+    type: number
+    default: 10
+{% endconfiguration %}