views/layout.erb
<!DOCTYPE html>
<html>
<head>
<title>Gem in a Box</title>
<link rel="stylesheet" href="<%= url "/master.css", false %>" type="text/css" media="screen">
<link href="<%= url "/atom.xml", false %>" type="application/atom+xml" rel="alternate" title="Atom Feed">
</head>
<body>
<div id="content">
<h1>Gem in a Box</h1>
<%= yield %>
</div>
</body>
</html>