Adding support for Gluon Models 🤖🛒

[smaranjitghose]

• Rename the function our_image_classifier to img_class_tf in the image_classifier.py file
• Write another function img_class_torch and define to load an image, convert it to the necessary numpy array (or any form you deem necessary, load a gluon model ( giving the PR, test it with any custom trained model and attach the video clip of the working demo), run inference and return the result.
• Note how the labels are defined.
• Feel free to add try-except statements for better debugging