Changes

• Added terrain.png, which makes most of block models added before 13w02a get changed!
• Changed models for Snowy Grass and Mycelium models, now uses the top texture on their normal form.
• Removed cullfacing on Stairs, Fences, Fence Gates, Pistons, Sticky Pistons, Snow, Oak and Iron Doors, and Dragon Eggs.
• Changed models for Uncolored Glass Panes and Iron Bars, post models now uses + shape instead of •!
• Changed Credits sequence to the old one.
• Renamed achievement message from "(Player) has made an advancement (Advancement) to (Player) has just earned an achievement (Achievement).
• Changed "Unknown" to "Mark Twain" in the post credit text.
• Removed tooltip name for End Stone.
• Removed crackling sound for Furnaces.
• Can now be played in 1.21.4+!
• Added 3 versions for block item forms!
• Changed Sulfur and Cinnabar blocksets.
• Changed Sulfur Cube outer texture.
• Changed Copper Chests to match pre-1.21.11 texture.
• Chests are now like pre-Beta 1.8 again!
• Removed shading inside Cauldrons, Flower Pots, and Hoppers!
• Water in Water Cauldron are now opaque.
• Lava and Powder Snow Cauldrons now use their 1.17 versions.
• Renaming White Stained Glass with 'Locked chest' now turns it into a Chest item!
• Fixed Emerald to Ruby renamings!
• Added Fast Grass Blocks option to PolyTone!