seq - quality control

[lmweber]

• simplify / shorten / update existing Visium examples and code
• add SpotSweeper example and reference
• mention any benchmark papers

[lmweber]

• check additional comments in Editorial Suggestions of Chapter 9 Quality Control #34

[lmweber]

• check additional comments in QC gene filtering: keep only protein-coding genes #30

[boyiguo1]

@lmweber I'm happy to contribute the SpotSweeper example to the book. Please feel free to assign things to me, if you have any particular idea and places wanting to be improved.

I would start working on Wed and Friday.

[lmweber]

Thanks @boyiguo1 , that would be great!

[boyiguo1]

Tagging @MicTott here too.

[lmweber]

• restructured the existing chapter to add a section for SpotSweeper (still need to shorten the existing examples and update text)

[lmweber]

• @MicTott if you want to tag yourself / add a comment here I can also assign you to the issue (GitHub only lets me assign people who have commented in an issue)