Good Night's Sleep

- Added new song "Sky Blue"
- Flowers and saplings can now be potted.
- Fixed not being able to use the Blast Furnace with our ores.
- Properly tagged Dream Dirt as forge:dirt.
- Adjusted Rainbow Ore drops, removed the chance for a Diamond.
- Fixed missing loot tables for Delusion Stone, Cobblestone, and Stone Brick slabs/stairs.
- Fixed Nightmare Grass dropping itself.
- Updated language files.
- Mushrooms now spawn in the Nether, as well as the Overworld, making them more common.