Rebuild docsify and delete docs caching code

docs/lib/plugins/external-script.js

@@ -0,0 +1,28 @@
+(function () {
+  function handleExternalScript() {
+    var container = Docsify.dom.getNode('#main');
+    var scripts = Docsify.dom.findAll(container, 'script');
+
+    for (var i = scripts.length; i--; ) {
+      var script = scripts[i];
+
+      if (script && script.src) {
+        var newScript = document.createElement('script');
+
+        Array.prototype.slice.call(script.attributes).forEach(function (attribute) {
+          newScript[attribute.name] = attribute.value;
+        });
+
+        script.parentNode.insertBefore(newScript, script);
+        script.parentNode.removeChild(script);
+      }
+    }
+  }
+
+  var install = function (hook) {
+    hook.doneEach(handleExternalScript);
+  };
+
+  window.$docsify.plugins = [].concat(install, window.$docsify.plugins);
+
+}());