Tree Hollows

Initial Release

• Adds 6 new blocks called "Hollows" for each vanilla wood type
• Hollows blocks have 3 by 3 inventory, mineable with axes, drop 3-5 sticks if mined without Silk Touch, can be renamed in anvil to show custom name in GUI
• Hollows will replace 2nd or 3rd log block in vanilla trees with 5% chance during world generation and will generate loot according to loot table
• Default tree hollows loot table will spawn 1-4 Stick/Feather and 0-2 of special items, see data/treehollows/loot_tables/chests/tree_hollows.json for exact list