A Dark Room runtime packaged for PLAYCHIVE

Upstream repository: https://github.com/doublespeakgames/adarkroom
Pinned revision: 1fada4620b6c66bd07bf15a3f1eb8223df8bc1d7
Upstream game: https://adarkroom.doublespeakgames.com/

A Dark Room is licensed under MPL-2.0. The full upstream license is included at
ADARKROOM-MPL-2.0.txt. The corresponding source is available from the upstream
repository above; PLAYCHIVE's packaging script is scripts/build-adarkroom-web.sh.

Packaging changes: the remote Google jQuery CDN fallback, Google Analytics and
an external studio-marketing link were removed. Gameplay code, localization,
audio, images and browser-local save data are served only from this directory.