Rebuild docsify and delete docs caching code

docs/lib/plugins/matomo.js

@@ -0,0 +1,42 @@
+(function () {
+  function appendScript(options) {
+    var script = document.createElement('script');
+    script.async = true;
+    script.src = options.host + '/matomo.js';
+    document.body.appendChild(script);
+  }
+
+  function init(options) {
+    window._paq = window._paq || [];
+    window._paq.push(['trackPageView']);
+    window._paq.push(['enableLinkTracking']);
+    setTimeout(function () {
+      appendScript(options);
+      window._paq.push(['setTrackerUrl', options.host + '/matomo.php']);
+      window._paq.push(['setSiteId', String(options.id)]);
+    }, 0);
+  }
+
+  function collect() {
+    if (!window._paq) {
+      init($docsify.matomo);
+    }
+
+    window._paq.push(['setCustomUrl', window.location.hash.substr(1)]);
+    window._paq.push(['setDocumentTitle', document.title]);
+    window._paq.push(['trackPageView']);
+  }
+
+  var install = function (hook) {
+    if (!$docsify.matomo) {
+      // eslint-disable-next-line no-console
+      console.error('[Docsify] matomo is required.');
+      return;
+    }
+
+    hook.beforeEach(collect);
+  };
+
+  $docsify.plugins = [].concat(install, $docsify.plugins);
+
+}());