Compression 2020 edits (#1688)

* Initial spell check

* Edit first pass.

* Update compression.md

one more format for Jyrki's bio

* Address TODOs.

* Fixing links and paragraphs.

* Fix figure links data/query links.

* Fixing bios.

* gzip -> Gzip, brotli -> Brotli, zopfli -> Zopfli

* update fig image

* Optimised images with calibre/image-actions

Co-authored-by: Barry <[email protected]>
Co-authored-by: Moritz Firsching <[email protected]>
Co-authored-by: Rick Viscomi <[email protected]>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>