add example usage of social profiles

fix #138

README.md

@@ -78,6 +78,18 @@ The SEO tag will respect any of the following if included in your site's `_confi
 * `social` - For [specifying social profiles](https://developers.google.com/structured-data/customize/social-profiles). The following properties are available:
   * `name` - If the user or organization name differs from the site's name
   * `links` - An array of links to social media profiles.
+  
+  ```yml
+  social:
+  name: Ben Balter
+  links:
+    - https://twitter.com/BenBalter
+    - https://www.facebook.com/ben.balter
+    - https://www.linkedin.com/in/BenBalter
+    - https://plus.google.com/+BenBalter
+    - https://github.com/benbalter
+    - https://keybase.io/benbalter
+    ```
 * `google_site_verification` for verifying ownership via Google webmaster tools
 
 The SEO tag will respect the following YAML front matter if included in a post, page, or document: