1. Added the local database (sqlite) which stores all information about chunks where seasons was changed. Because of this, chunk biome modification will only happen once per season. This greatly speeds up the loading of chunks and the sending of packets after the chunk has already been modified at least once.
2. Added new language file: ru.yml. I'm a native speaker of Russian, so this translation is the author's.
3. Fixed various bugs with displaying messages in the chat.
4. Fixed one rather funny bug when animals spawns in water.
5. Improved the improved-snowfall feature. Now snow piles up in layers! (requested by @SnowCutieOwO)

Because of small tweaks in config.yml, you should delete the old one. I'll make the auto-updateable config in the future, now I'm too lazy.