New features:
- Added language file and made /season messages fully configurable. After this update, the messages section can safely be removed from the config since everything will now be in a separate language file.
- Added developer API: more info on the API section on the main page.
- Improved overall performance
- Added an option to config that stops snowman from attacking mobs (prevents huge fights in winter at night)
- Added an option to the config that makes the snowmen more friendly (they won't have a pumpkin on their head).

(Bug)fixes:
- Spawn-chance-animals is now higher by default (will spawn fewer mobs)
- Fixed PlaceholderAPI giving errors when no player was specified on request (caused errors with DiscordSRV).
- Fixed cows, pigs, chickens and sheep farms getting despawned sometimes by the plugin.