Add `dataset` function for each dataset

[lgvaz]

🚀 Feature

For each dataset we can also add a dataset function that returns a train,valid dataset with default transforms included.

This would also reduce the amount of repeated code on icevision tutorials.

HOW TO

Follow the structure of datasets/fridge/dataset.py or datasets/pennfudan/dataset.py:

1. Create dataset.py file
2. Add from icedata.datasets.<DATASET_FOLDER>.dataset import * to datasets/<DATASET_FOLDER/__init__.py

TODO (no specific order)

• [x] fridge
• [x] pennfudan
• [x] birds
• [x] biwi
• [x] coco (In progress by: @jpoberhauser)
• [ ] ochuman
• [x] pets (in progress by: @ganesh3)
• [x] voc

[lgvaz]

Added dataset function for fridge

[jpoberhauser]

I can get started on coco

[ganesh3]

I can do it on pets