Lighthouses

You can now build lighthouses!

*(Though sadly the lighthouses have been decommissioned and won't shine at night (for now)). *

For esoteric technical reasons this kind of lighthouse pattern was not possible without rewriting some core technical stuff. On the plus side, that rewrite provided some optimization to the core algorithm, and also opened up for some other minor architectural elements that were previously not possible.

I also fixed some seams and discontinuities in the grid (caused by floating point errors). These errors would appear when you build far out from the center of the world. With the new grid I'm kinda encouraging you to do that, so I felt it was thus becoming to adress that bug.

Best wishes, Oskar Stålberg