A lot of new features, the obvious one being: loopings! Requested for so long, it is finally here!

• Full implementation of upside-down rails: placement, block physics, train physics, disable block suffocation damage (survival)
• Full implementation of upside-down network synchronization logic: render players upside-down
• Vertical and upside-down rails: correct the camera position of the player to not clip through the minecart
• Fixes to vertical <> (upside-down) slope train physics
• Correct display and synchronization of minecart rotation
• Implement a new train motion physics system that much better supports "air jumps"
• Fix manual minecart movement not working (vanilla, press W to move. Only when enabled through properties)
• Fix minecarts being selected for editing when they are being destroyed (don't lose selection when destroying with hand/arrow)
• Added a new 'wait distance' property for trains, to maintain distance between them and trains up ahead automatically
• Added a 'mutex' sign, to avoid multiple trains crossing a junction