This required a new architecture for serving replays from inside the
client repository, because that seems like a better call than
introducing yet another PS repository.
(Experience gives me the impression that separating repositories wasn't
a good idea, and we should be working to make PS more mono-repo-like,
rather than less.)
License for replay code is tentatively AGPLv3, although feel free to ask
for a more permissive license if you have plans to use it in an
open-source project that requires it.
We no longer have the relevant Githook for automatic building, so
putting it in `githooks/` no longer makes much sense. It's now manually
called with a build script `./build`, like other PS websites (most
notably PSDex and the damagecalc).
