Add ckeditor autosave plugin to drupal ckeditor module

gistfile1.php

<?php
// Create a "plugins" directory in the gs_wysiwyg module and add the ckeditor autosave plugin to it.
// Then add the following code into the gs_wysiwyg.module file

/**
 * Implements hook_ckeditor_plugin().
 */
function gs_wysiwyg_ckeditor_plugin() {
  $plugin_path = drupal_get_path('module', 'gs_wysiwyg') . '/plugins/';

  return array(
    //autosave to localstorage
    'autosave' => array(
      'name' => 'autosave',
      'desc' => t('This Plugin autosaves to local storage. See !addon page for more details.', array('!addon' => l(t('addon'), 'http://ckeditor.com/addon/autosave'))),
      'path' => $plugin_path . 'autosave/',
    ),
  );
}