Ghost recording doesn't work with rolls

Rolls multiply velocity when applying it to position (without actually saving velocity in the movement controller). Since ghosts record velocity, they break when the player rolls. Alternative approaches: - record position instead (would break animation) - record timestamps and grid positions and navigate between them using variable acceleration (animation works, tricky to implement correctly) - record timestamps and grid positions and lerp between them, create a new animation system for ghosts (or don't, they're floaty)