Alpha Version 0.2.7

• First environment blocks: Hardstone Wall & Floor - Dark black stone, remnants from the Great Collision.
• New wall ores: Copper, Lead, and Erythronic Wall
• New distributor blocks: Plated distributors - Tougher and faster than the Iron ones.
• Added Railstack Junction and Railstack Router - High-capacity blocks designed for use with the Railstack Conveyor.
• New wall: Astranium Wall - This wall is heavily armored, and is so magnetic that it pulls nearby bullets towards it.
• Added Iron Door - A door wall that automatically opens for units that get close. (It doesn't even need a pressure plate!)
• New bore: Pulse Bore - An advanced late-game 4x4 bore that uses plasma to extract large quantities of wall ores.
• Slight rebalancing to some distributors.
• Buffed Dart damage and range.
• Railstack conveyors no longer transfer to lower capacity stack conveyors.
• Plasma Energizer no longer costs Neodymium (fixing a loop where you needed Neodymium to produce Plasma but needed Plasma drills to mine Neodymium)
• Fixed item bridge display issue.
• Weird Explosives Plant animation is fixed.

Contributors: @slashkig @IAmRustee @VoidThreader