Genvarloader

Feat

- indexing matches input bed file. make sel() a private method pending better API design. fix: pass tests for indexing and separate indexing and subsetting logic into DatasetIndexer.
- write input regions to disk with a column mapping each to a row in the sorted dataset regions

Fix

- passing tests
- passing tests
- passing tests

Fix

- update rust dependencies.

Fix

- unintended torch requirements

Fix

- update version
- StratifiedSampler requires torch. fix: remove deprecated conda env files.

Fix

- handle empty genotypes during gvl write. fix: PgenGenos sample_idx should be sorted when compared to current sample_idx.

Feat

- bump version
- geuvadis tutorial.
- tutorial notebook, pooch dependency.

Fix

- update available tracks after writing transformed ones to disk.