Tweaks:
- Full rewrite of chunk modification algorithm. Vivaldi works a lot faster now and tries to use all threads of your CPU. So, the more powerful your processor and the more cores it has, the faster Vivaldi will work.
- Extra snow from immersive snow feature will no longer appear on blocks which cannot be snowed.
- World in which Vivaldi will work can now be specified in config.yml.
- Plugin loads faster now.

New content:
- Blacklist for biomes. Can be found in config.yml. Seasons never will be changed in blacklisted biomes.