add gittip button

Author: Evan You

themes/vue/layout/partials/sidebar.ejs

@@ -6,6 +6,11 @@
         <% site.pages.find({type: type}).sort('order').each(function (p) { %>
             <li><a href="/<%- p.path %>" class="sidebar-link<%- page.title === p.title ? ' current' : '' %>"><%- p.title %></a></li>
         <% }) %>
+        <li style="margin:10px 0 3px">
+          <script data-gittip-username="yyx990803"
+            data-gittip-widget="button"
+            src="//gttp.co/v1.js"></script>
+        </li>
         </ul>
     </div>
 </div>