brush rendering is now completely client-side.
the server only receives edits the client would like to do, in the form of PNG images of chunks, that are then composited onto the wall
known issue: it is possible to brush up against the current 256 chunk edit limit pretty easily.
I'm not sure it can be solved very easily though. the perfect solution would involve splitting up the interaction into multiple edits, and I tried to do that, but there's a noticable stutter for some reason that I haven't managed to track down yet.
so it'll be kinda crap for the time being.
for faster load times, and seamless updates.
because for some reason ServeDir can't do it correctly, and it tells the client "yeah hey nothing changed" even if something changed
> #81 Compiling brush doesn't seem to finish correctly sometimes, which causes loss of data
> Sometimes it seems like the client state can get desynced (server render thread dies due to a panic?) and then the server starts dropping all requests for drawing the brush.
> These panics should never happen of course, but we need better logging first to determine the exact cause.
