Add theme-color and image alt text

inc/footer.inc.php

@@ -1,5 +1,5 @@
 <hr>
         <div style="text-align: center;">
-            <img src="/res/img/buttons/browser.gif">&nbsp;<a href="https://www.linux.org/"><img src="/res/img/buttons/linuxnow.gif"></a>&nbsp;<a href="https://www.vim.org/"><img src="/res/img/buttons/vim.gif"></a>&nbsp;<a href="http://jigsaw.w3.org/css-validator/check/referer"><img style="border:0;width:88px;height:31px" src="/res/img/buttons/vcss-blue.gif" alt="Valid CSS!"></a>&nbsp;<a href=""><img style="border:0;width:88px;height:31px" src="/res/img/buttons/valid-html401-blue.png" alt="Valid HTML 4.01!"></a><br>
+            <img src="/res/img/buttons/browser.gif" alt="Any Damn Browser">&nbsp;<a href="https://www.linux.org/"><img src="/res/img/buttons/linuxnow.gif" alt="Linux NOW!"></a>&nbsp;<a href="https://www.vim.org/"><img src="/res/img/buttons/vim.gif" alt="vim"></a>&nbsp;<a href="http://jigsaw.w3.org/css-validator/check/referer"><img style="border:0;width:88px;height:31px" src="/res/img/buttons/vcss-blue.gif" alt="Valid CSS!"></a>&nbsp;<a href=""><img style="border:0;width:88px;height:31px" src="/res/img/buttons/valid-html401-blue.png" alt="Valid HTML 4.01!"></a><br>
             Last Modified <span class="date"><?=date('Y-m-d H:i:s', filemtime($file) + 3600);?> GMT</span>
         </div>

inc/header.inc.php

@@ -1,5 +1,6 @@
 <meta charset="utf-8">
     <meta property="og:type" content="website">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="theme-color" content="#333333">
     <link rel="stylesheet" id="theme" href="/res/css/dark.css" type="text/css">
     <script defer data-domain="diskfloppy.me" src="https://analytics.nickandfloppy.com/js/plausible.js"></script>