incorporate single cell DESeq2?

[siebrenf]

Only thing worth discussing here is whether it makes sense the cluster ID is in the samples.tsv or if that should be a separate file. Idk what's easier from the user point of view. And what would be easier in the future if we add this to the single cell RNA-seq workflow

Originally posted by @Maarten-vd-Sande in #830 (review)

[stale]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?