FileUploadWidget- Removed backbone events line, added headers

examples/widgets/File Upload Widget.ipynb

@@ -100,6 +100,14
      "prompt_number": 1
     },
     {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Custom Widget"
+     ]
+    },
+    {
      "cell_type": "code",
      "collapsed": false,
      "input": [
@@ -146,7 +154,6
       "        },\n",
       "        \n",
       "        // Handles: User input\n",
-      "        events: { \"change\" : \"handleFileChange\" }, \n",
       "        handleFileChange: function(evt) { \n",
       "            \n",
       "            //Retrieve the first (and only!) File from the FileList object\n",
@@ -231,6 +238,14
      "prompt_number": 3
     },
     {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Usage"
+     ]
+    },
+    {
      "cell_type": "code",
      "collapsed": false,
      "input": [
@@ -272,14 +287,6
       }
      ],
      "prompt_number": 4
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
     }
    ],
    "metadata": {}