v0.0.4a - Mostly just a hotfix

v0.0.4 introduced a nasty crash when a player would disconnect while in the loading screen caused by a stupid way of getting the client number. I've preemptively also fixed it in a couple of other places.

I also sneaked in a small change that adds a new event new_game that goes off for map changes, game starts, and for aborts. This can be used to set configstring 3, since it's reset in all these cases, meaning map alone won't do it.