Fix typo dataset -> datasets

Fix config constructor

Fix typo-indent line 111

Fix tab-indentation

Fix indentation error

Add a builder configuration: image-classification + image-segmentation

Pequeños cambios. (#1)

Change URLS: .tar.gz -> .zip

Fix typo and indent rock-glacier-dataset.py

Rename val.tar.gz -> validation.tar.gz

Fix tab indent

Create custom dataloader script