Adding Twitter Account ID.

Author: TheSeg

_includes/head.html

@@ -16,6 +16,7 @@
   <meta name="twitter:image" content="http://theseg.github.io/img/twittercard_image.jpg">
   <meta name="twitter:card" content="summary_large_image">
   <meta name="twitter:creator" content="@TheSeg">
+  <meta property="twitter:account_id" content="13731442" />
   <mega property="profile:first_name" content="John">
   <mega property="profile:last_name" content="Seggerson">
   <meta property="og:title" content="John &quot;Seg&quot; Seggerson: Resumé">