added description

Author: hagenburger

source/layouts/layout.erb

@@ -4,6 +4,7 @@
     <meta charset="utf-8">
     <meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
     <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=1" name="viewport">
+    <meta content="<%= t('header.title') %>" name="description">
     <title><%= t('header.title') %></title>
     <link href="stylesheets/style.css" rel="stylesheet">
     <script src="//use.typekit.net/vvs3qav.js"></script>