Right now every page's body tag has a class with the title of the page itself, such as:
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-Fisica skin-Neverland action-view">
would be nice to add categories too, this could become:
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-Fisica category-Structure skin-Neverland action-view">
Description
Description