Adição das og tags

Author: raniery

_config.yml

@@ -2,8 +2,9 @@
 title: PHPDF
 description: Grupo de desenvolvedores PHP do Distrito Federal
 owner: PHPDF
+url: "http://www.phpdf.org.br"
+image: "/images/logo-cinza-azul.png"
 baseurl: ""
-url: "https://www.phpdf.org.br"
 social:
   twitter: https://twitter.com/phpdf_
   github: https://github.com/php-df

_includes/head.html

@@ -10,4 +10,10 @@
   <!--[if lte IE 8]><link rel="stylesheet" href="{{ "/css/ie8.css" | prepend: site.baseurl }}" /><![endif]-->
   <!--[if lte IE 9]><link rel="stylesheet" href="{{ "/css/ie9.css" | prepend: site.baseurl }}" /><![endif]-->
   <link rel="alternate" type="application/rss+xml" title="{{ site.title }}" href="{{ "/feed.xml" | prepend: site.baseurl | prepend: site.url }}">
+
+  <meta property="og:url" content="{{ site.url }}" />
+  <meta property="og:title" content="{{ site.title }}" />
+  <meta property="og:description" content="{{ site.description }}" />
+  <meta property="og:image" content="{{ site.url }}{{ site.image }}" />
+
 </head>