Add social meta tags
(Open graph/Facebook headers, Twitter headers)
<!-- Twitter Card data -->
<meta name="twitter:card" content="summary">
<meta name="twitter:site" content="@publisher_handle">
<meta name="twitter:title" content="Page Title">
<meta name="twitter:description" content="Page description less than 200 characters">
<meta name="twitter:creator" content="@author_handle">
<-- Twitter Summary card images must be at least 120x120px -->
<meta name="twitter:image" content="http://www.example.com/image.jpg">

<!-- Open Graph data -->
<meta property="og:title" content="Title Here" />
<meta property="og:type" content="article" />
<meta property="og:url" content="http://www.example.com/" />
<meta property="og:image" content="http://example.com/image.jpg" />
<meta property="og:description" content="Description Here" />
<meta property="og:site_name" content="Site Name, i.e. Moz" />
<meta property="fb:admins" content="Facebook numeric ID" /> <- Tell WMNL how to get it