Villager Trades

- Config is now server-side only, meaning it is stored in /saves/world/serverconfig rather than in /config. Format stays the same, so you can just copy the old contents into the serverconfig.

- If you add trades for one profession at one level, you now only need to re-add the other trades for that profession at that level (previously, you needed to re-add it for all professions at that level). So if you wanted to add a trade to the lvl 2 armorer, you only need to add your trade and the four vanilla trades for the lvl 2 armorer instead of all lvl 2 trades for all professions.