Mark up user profile using microdata.

- `itemscope` &mdash; By adding itemscope, you are specifying that the HTML contained in the `<div>...</div>` block is about a particular item
- `itemtype` &mdash; This specifies that the item contained in the div is in fact a **Person**, as defined in the schema.org type hierarchy. Item types are provided as URLs, in this case http://schema.org/Person