[example] fix example names

examples/classification.ipynb

@@ -1,7 +1,7 @@
 {
  "metadata": {
+  "name": "ImageNet classification",
   "description": "Use the pre-trained ImageNet model to classify images with the Python interface.",
-  "name": "ImageNet Classification",
   "include_in_docs": true
  },
  "nbformat": 3,

examples/filter_visualization.ipynb

@@ -1,8 +1,8 @@
 {
  "metadata": {
+  "name": "Filter visualization",
   "description": "Extracting features and visualizing trained filters with an example image, viewed layer-by-layer.",
-  "include_in_docs": true,
-  "name": ""
+  "include_in_docs": true
  },
  "nbformat": 3,
  "nbformat_minor": 0,