Fixed widget.js and notebook.js so IPython.notebook.widget_manager is created.

IPython/html/static/notebook/js/notebook.js

@@ -1288,25 +1288,19 b' var IPython = (function (IPython) {'
      * 
      * @method start_session
      */
-    Notebook.prototype.start_session = function () {
-        this.session = new IPython.Session(this.notebook_name, this.notebook_path, this);
-        this.session.start($.proxy(this._session_started, this));
-    };
-
-
-    /**
-     * Once a session is started, link the code cells to the kernel
-     *
-     */
-    Notebook.prototype._session_started = function(){
-        this.kernel = this.session.kernel;
+    Notebook.prototype.start_kernel = function () {
+        var base_url = $('body').data('baseKernelUrl') + "kernels";
+        this.kernel = new IPython.Kernel(base_url);
+        this.kernel.start({notebook: this.notebook_id});
+        // Now that the kernel has been created, tell the CodeCells about it.
         var ncells = this.ncells();
         for (var i=0; i<ncells; i++) {
             var cell = this.get_cell(i);
             if (cell instanceof IPython.CodeCell) {
                 cell.set_kernel(this.session.kernel);
             };
-        };  
+        };
+        this.widget_manager = IPython.WidgetManager(this.kernel.comm_manager);
     };
     
     /**

IPython/html/static/notebook/js/widget.js

@@ -19,7 +19,7 b''
 // require(['components/underscore/underscore-min.js',
 //          'components/backbone/backbone-min.js'],
 
-var IPython = function (IPython) {
+var IPython = (function (IPython) {
     "use strict";
 
     //-----------------------------------------------------------------------
@@ -224,6 +224,7 b' var IPython = function (IPython) {'
     IPython.WidgetModel = WidgetModel;
     IPython.WidgetView = WidgetView;
 
+  
     return IPython;
 
-};
+}(IPython));