Updating chat to use OSP DIN font and show players joining and leaving. Doesn't quite work 100% but it's something.

(cherry picked from commit 2ce9a86f10eb652000d61cf485c99da418549d90)
Custom loading screen with three.js car animation demo. May consume too much CPU/GPU/whatever.

(cherry picked from commit 769acb289d39ceebdf52894b7f5f7ab494515f6f)
We don't need this anymore.