Fixes #1075 : Display test image

[suvigyajain0101]

Can add a simple line at the end to show what the image looks like along with it's predictions. Please ignore multiple commits. Overall it's adding 1 line -

plt.imshow(img); # Display test image

to the following 3 files -

1. examples/vision/image_classification_from_scratch.py
2. examples/vision/ipynb/image_classification_from_scratch.ipynb
3. examples/vision/md/image_classification_from_scratch.md