Quiets notes as they stop

Also updates test page with play/pause

Factor tests out into test.js, rename index.html -> test.html

scripts: use with keyword in order to remove redundant pkgs namespacing

Moves plant data out into plantData.json

Adds PlantSynth class, compressor node, and data transformation code

Adds Parcel as a dev dependency to package.json

Adds Play button to index.html

csv-to-mint: make compatible with env on older distros, re-enable -w

scripts: Update README giving nix setup information and a typo fix.

scripts: Add nix shell recipe for csv-to-mint perl script

scripts: Make perl script work in a nix environment

See this wiki entry: https://nixos.wiki/wiki/Perl

csv-to-mint: fancier example, and handle purearray case

scripts/README.md: document csv-to-mint

csv-to-mint: add --conversion example

New CSV file

csv-to-mint: add generic to_mint, hashkey, groupByNumber

csv-to-mint: sort hash keys

csv-to-mint: add --repl and --conversion options

Latter isn't tested yet.

How it probably should work (in pseudo-Mint)

csv-to-mint: assume --auto-numbers if --auto-integers is given