Update custom.js for 3.0

IPython/html/static/custom/custom.js

@@ -11,16 +11,20 b''
  * It will be executed by the ipython notebook at load time.
  *
  * Same thing with `profile/static/custom/custom.css` to inject custom css into the notebook.
- * 
- * Classes and functions are available at load time and may be accessed plainly: 
- * 
+ *
+ * Classes and functions are available at load time and may be accessed plainly:
+ *
  *     IPython.Cell.options_default.cm_config.extraKeys['Home'] = 'goLineLeft';
  *     IPython.Cell.options_default.cm_config.extraKeys['End'] = 'goLineRight';
- * 
+ *
  * Instances are created later however and must be accessed using events:
- * 
- *     $([IPython.events]).on("app_initialized.NotebookApp", function () {
- *         IPython.keyboard_manager....
+ *     require([
+ *        'base/js/namespace',
+ *        'base/js/events'
+ *     ], function(IPython, events) {
+ *         events.on("app_initialized.NotebookApp", function () {
+ *             IPython.keyboard_manager....
+ *         });
  *     });
  *
  * __Example 1:__
@@ -28,26 +32,35 b''
  * Create a custom button in toolbar that execute `%qtconsole` in kernel
  * and hence open a qtconsole attached to the same kernel as the current notebook
  *
- *    IPython.events.on('app_initialized.NotebookApp', function(){
- *        IPython.toolbar.add_buttons_group([
- *            {
- *                 'label'   : 'run qtconsole',
- *                 'icon'    : 'icon-terminal', // select your icon from http://fortawesome.github.io/Font-Awesome/icons
- *                 'callback': function () {
- *                     IPython.notebook.kernel.execute('%qtconsole')
- *                 }
- *            }
- *            // add more button here if needed.
- *            ]);
+ *    require([
+ *        'base/js/namespace',
+ *        'base/js/events'
+ *    ], function(IPython, events) {
+ *        events.on('app_initialized.NotebookApp', function(){
+ *            IPython.toolbar.add_buttons_group([
+ *                {
+ *                    'label'   : 'run qtconsole',
+ *                    'icon'    : 'icon-terminal', // select your icon from http://fortawesome.github.io/Font-Awesome/icons
+ *                    'callback': function () {
+ *                        IPython.notebook.kernel.execute('%qtconsole')
+ *                    }
+ *                }
+ *                // add more button here if needed.
+ *                ]);
+ *        });
  *    });
  *
  * __Example 2:__
  *
  * At the completion of the dashboard loading, load an unofficial javascript extension
- * that is installed in profile/static/custom/ 
+ * that is installed in profile/static/custom/
  *
- *    IPython.events.on('app_initialized.DashboardApp', function(){
- *        require(['custom/unofficial_extension.js'])
+ *    require([
+ *        'base/js/events'
+ *    ], function(events) {
+ *        events.on('app_initialized.DashboardApp', function(){
+ *            require(['custom/unofficial_extension.js'])
+ *        });
  *    });
  *
  * __Example 3:__