* Remove `task` arg in `load_dataset` in image-classification example
* Manage case where "train" is not in dataset
* Add new args to manage image and label column names
* Similar to audio-classification example
* Fix README
* Update tests
- Add --ignore_mismatched_sizes argument to classification examples
- Expand the error message when loading a model whose head dimensions are different from expected dimensions
* Add first draft
* Improve README and run fixup
* Make script aligned with other scripts, improve README
* Improve script and add test
* Remove print statement
* Apply suggestions from code review
* Add num_labels to make test pass
* Improve README