DeiT Image Classifier. Resolving the issue "Transformer based image classifier #254"

[ShreyasJoshi7]

Description

I have added a notebook which demonstrates the training of DeiT model to perform image classification on custom dataset. I demonstrate training on a custom dataset from roboflow. I have mentioned the links for the original github repo and the paper in the readme file and the noteboook

dependencies: roboflow (for dataset)

Type of change

Please delete options that are not relevant.

• [ x] Bug fix (non-breaking change which fixes an issue)
• [ x] New feature (non-breaking change which adds functionality)
• [ x] This change requires a documentation update

How has this change been tested, please provide a testcase or example of how you tested the change?

I have tested the code on the roboflow dataset. specifically the Tumor-Classification-1 dataset's test data.

Any specific deployment considerations

No.

Docs

• [ x] Docs updated? What were the changes: Updated the readme doc.

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