Implements better opengraph and twitter card.

Author: dom96

jekyll/_includes/head.html

@@ -29,13 +29,18 @@
 
   </script>
 
-  <meta property="og:type" content="website">
-  <meta property="og:site_name" content="nim-lang.org">
-  <meta property="og:title" content="Nim programming language">
-  <meta property="og:description" content="Nim is a systems and applications programming
-    language. Statically typed and compiled, it provides unparalleled performance in an elegant package.">
-  <meta property="og:image" content="https://nim-lang.org/assets/img/logo.png">
-  <meta property="og:image:secure_url" content="https://nim-lang.org/assets/img/logo.png">
-  <meta property="og:url" content="https://nim-lang.org">
+  <meta name="twitter:title" content="Nim Programming Language">
+  <meta name="twitter:description" content="A systems programming language that is statically typed and compiled to incredibly efficient dependency free binaries.">
+  <meta name="twitter:site" content="@nim_lang">
+  <meta name="twitter:card" content="summary_large_image">
+  <meta name="twitter:image" content="https://nim-lang.org/assets/img/twitter_banner.png">
+
+  <meta property="og:title" content="Nim Programming Language" />
+  <meta property="og:type" content="website" />
+  <meta property="og:image" content="https://nim-lang.org/assets/img/twitter_banner.png" />
+  <meta property="og:image:type" content="image/png" />
+  <meta property="og:image:width" content="1000" />
+  <meta property="og:image:height" content="500" />
+  <meta property="og:image:alt" content="Nim Programming Language" />
 
 </head>