Merge pull request aimacode#158 from Chipe1/search

Added image for graph in search.ipynb

Author: norvig

games.ipynb

@@ -196,7 +196,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src=\"images/fig_5_2.png\" width=\"75%\">"
+    "<img src=\"images/fig_5_2.svg\" width=\"75%\">"
    ]
   },
   {
@@ -594,7 +594,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.1"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,