Make the 0-commit color more distinct

Add --cache-file

Fix initial server reponse behavior, add --pull

Add -q

Fix an ordering bug in the server, and add timestamps to logs

Fix content-types

Tweak subcommands and flags

Fix clippy warnings

Improve css

Switch from iso weeks to normal ones, add "ghost days"

Clean up and optimize the server a bit

Tweak cli and update readme

Update readme

Update readme

Fix server and run rustfmt

Add --external-css

Add the `server` command, separate file output to `generate`

Make rayon optional and optimize commit analysis

...by a few orders of magnitude. Turns out you can just ask `git log`
for the dates!

Finish reorganization

Split main into logical units