What's Changed
* Don't use raw matrix for marker calculation unless appropriate, use load_to_scxa_db matrix by default. by pinin4fjords in https://github.com/ebi-gene-expression-group/atlas-anndata/pull/32
* Remove single groups from marker detection by pinin4fjords in https://github.com/ebi-gene-expression-group/atlas-anndata/pull/33
* Sanitise fields to be used for marker detection to avoid HDF5 write errors by pinin4fjords in https://github.com/ebi-gene-expression-group/atlas-anndata/pull/34
**Full Changelog**: https://github.com/ebi-gene-expression-group/atlas-anndata/compare/v0.1.5...v0.1.6