GitLab

* close file.

* staying with datapoints as tuples until further notice.

* loading tsv as dict.

* BackgroundGenerator
* renaming disk cache.

Fix test for datasets.

* new dataset format.
* add basic test.
* files for testing.
* serialization using torch.
* add diskcache.
* adding deprecation warnings.
* removing legacy.
* warning about transforms.
* detecting file format using reader.