The result image is nothing like the expected "style-transfer" image

Hello,

I have run the code in your Jupyter notebook but the result image after training does not look like the "style-transfer" image that you'd expect. Did I do anything wrong or is there any way to make the image better? Here is the screenshot:

<img width="964" alt="neural-jupyter" src="https://user-images.githubusercontent.com/7154255/27258003-8fc7b7ee-53bb-11e7-9ca5-be83069d9480.png">
