Shooting a werecrow tells you it was one

Also fix the game start message, fix minor exploit with 10 second delays on join, and remove some useless fluff from the guardian angel death message.

Basically the same as the last pull request, but without the werecrow message changes, and with the fix where the first person to join could !leave and !quit and delay the game another 10 seconds, even though they had already joined (had a problem with this when trying to start a 4p game once)