adding prerender meta tag

Author: Parth Shah

app/index.jade

@@ -5,6 +5,7 @@ html
 
     meta(http-equiv="X-UA-Compatible", content="IE=edge, chrome=1")
     meta(name="viewport", content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no")
+    meta(name="fragment", content="!")
 
     // favicon
     link(rel="shortcut icon", type="image/png", href="/images/favicon.ico")