You can make it to load jQuery from Google CDN and Zepto from your server:
<script>
document.write('<script src=' +
('__proto__' in {} ? 'js/vendor/zepto' : '//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min') +
'.js><\/script>')
</script>
You can also make it always load jQuery and completely ignore Zepto, to do this add:
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
to your <head>
section and remove document.write
call.