mobile: set a viewport and async-load javascript

Author: timo

template/head.html

@@ -1,7 +1,8 @@
+<meta name=viewport content="width=device-width, initial-scale=1">
 <link rel="icon" href="/favicon.ico" type="image/x-icon" />
 <link rel="stylesheet" type="text/css" href="/css/style.css" media="screen" title="default" />
 <link type="text/css" href="/css/custom-theme/jquery-ui-1.8.21.custom.css" rel="stylesheet" />
 <link type="text/css" href="/css/pygments.css" rel="stylesheet" />
-<script type="text/javascript" src="/js/jquery-1.7.2.min.js"></script>
-<script type="text/javascript" src="/js/jquery-ui-1.8.21.custom.min.js"></script>
-<script type="text/javascript" src="/js/search.js"></script>
+<script async type="text/javascript" src="/js/jquery-1.7.2.min.js"></script>
+<script async type="text/javascript" src="/js/jquery-ui-1.8.21.custom.min.js"></script>
+<script async type="text/javascript" src="/js/search.js"></script>