Update Torch docs and script perminssions.

samples/torch/README.md

@@ -16,8 +16,8 @@ make sure you have Python 2.X and pyyaml installed:
     # Linux: if you don't have pip
     apt-get -y install python-pip
     
-    # if you don't have pyyaml
+    # if you don't have pyyaml or typing
-    sudo pip install pyyaml
+    sudo pip install pyyaml typing
     
 Now
 
@@ -45,4 +45,4 @@ You may need to specify `LD_LIBRARY_PATH` or `DYLD_LIBRARY_PATH` to `$HOME/.kona
 if the ATen dynamic library cannot be found.
 
 Even on a CPU, training should only take some minutes, 
-and you should observe a classification accuracy of about 95% on the test dataset.
+and you should observe a classification accuracy of about 95% on the test dataset.