added container options to docs for popover

docs/javascript.html

@@ -1023,6 +1023,14 @@ $('a[data-toggle="tab"]').on('shown', function (e) {
               <p>Object structure is: <code>delay: { show: 500, hide: 100 }</code></p>
              </td>
            </tr>
+           <tr>
+             <td>container</td>
+             <td>string | false</td>
+             <td>false</td>
+             <td>
+              <p>Appends the tooltip to a specific element <code>container: 'body'</code></p>
+             </td>
+           </tr>
           </tbody>
         </table>
         <div class="alert alert-info">