head_panel.php

<link rel="stylesheet" href="ace-master/assets/font-awesome/4.5.0/css/font-awesome.min.css" />
<link rel="stylesheet" href="ace-master/assets/css/fonts.googleapis.com.css" />
<link rel="stylesheet" href="ace-master/assets/css/ace.min.css" class="ace-main-stylesheet" id="main-ace-style" />
<link rel="stylesheet" href="ace-master/assets/css/ace-skins.min.css" />
<link rel="stylesheet" href="ace-master/assets/css/ace-rtl.min.css" />
<script src="ace-master/assets/js/ace-extra.min.js"></script>