Cherry Blossom Grotto

Given that I've been pushing out "beta" builds of this mod for so long I've decided its stable enough that I'm going to mark this as the first non-beta release! Got some more ideas for future features but for now, here's how this release rounds out the mod into its big release:

• Added the new cherry blossom slopes biome! This biome has a sparse forest of cherry blossom trees spawn on snowy mountainsides
• Added the new cherry blossom bamboo jungle biome! This biome is a bamboo jungle interspersed with cherry blossom trees
• Added new surface rules to customize how snow and dirt spawns in the new cherry blossom slopes biome
• Update lots of tags, mostly for biomes, to ensure all modded biomes are associated with the right information
• Reduce the commonality of cherry blossom biomes. They will now spawn much less frequently in vanilla worlds.