Added idField to welcome example.

Author: wenzhixin

welcome.html

@@ -42,6 +42,7 @@ <h1>Bootstrap Table Examples <a href="https://github.com/wenzhixin/bootstrap-tab
            data-minimum-count-columns="2"
            data-show-pagination-switch="true"
            data-pagination="true"
+           data-id-field="id"
            data-page-list="[10, 25, 50, 100, ALL]"
            data-show-footer="true"
            data-side-pagination="server"