http://stackoverflow.com/questions/9047703/fixed-position-navbar-obscures-anchors
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<link rel="stylesheet" href="/static/bootstrap/css/bootstrap.css" type="text/css" />
<link rel="stylesheet" href="/static/bootstrap/css/bootstrap-responsive.css" type="text/css" />
<script type="text/javascript" src="/static/bootstrap/js/bootstrap-dropdown.js"></script>
<script type="text/javascript" src="/static/bootstrap/js/bootstrap-tab.js"></script>
<script type="text/javascript" src="/static/bootstrap/js/bootstrap-alert.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="/static/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<link href="/static/bootstrap/css/bootstrap-responsive.min.css" rel="stylesheet">
<script type="text/javascript" src="/static/bootstrap/js/bootstrap.min.js"></script>
:target {
padding-top: 40px;
margin-top: -40px;
display: inline-block; /* required for webkit browsers */
}