Fix teleporting of players when they are in vehicle

Force a player to leave a vehicle as otherwise is blocks the teleport and they get stuck in the arena.
Implemented auto-start feature

Add auto-start arena config option. When this option is enabled and all the teams in an arena are full then it will anatomically start the event. If a minimum player count is specified then players can flag themselves as ready by saying “ready” after then have selected a team, when the minimum number of players have flagged themselves as ready then the event will start.

Moved player join team logic from the clickSign function into the previously unused playerJoinTeam function.

Unify more of remove player code in EMS team to help with tracking of full teams.

Fix join sign count to also count players who have selected teams
Allow host commands to be run from console and command blocks
Fix join sign so it uses the same logic as the join command (and thus allows players into already running events)