add language option at nav

layouts/index.html

@@ -159,7 +159,7 @@
     <div class="jumbotron">
       <div class="actix-jumbotron">
         <img src="/img/logo-large.png" class="align-middle actix-logo" alt="">
-        <p class="lead">Rust的actor系统和有趣的web框架</p>
+        <p class="lead">Rust强大的actor系统和有趣的web框架</p>
       </div>
     </div>
   

layouts/partials/header.html

@@ -42,6 +42,13 @@
             <li class="nav-item">
               <a class="nav-link" href="/code/">Code</a>
             </li>
+            <li class="nav-item" id="language">
+                <div id="lang">EN</div>
+                <ul class="subitem">
+                    <li class="submenu-item"><a href="https://actix.rs">English</a></li>
+                    <li class="submenu-item"><a href="https://actix.rs/cn">中文</a> </li>
+                </ul>
+            </li>
           </ul>
         </div>
       </nav>