Remove methods to improve points/corner and to calculate the watersheds we don't use
Prevent duplicate corners for our polygons
Clean up on Corner
Fix Point.interpolate to be truly in the middle and add Point.__eq
Add helper table.merge
Be less precise about duplicate corner points in MapGen
Start contourlines on map to get a more realistic map
Fix contourlinesmap, needed a proper difference so v1->v0 slopes do get mapped as well :)
In Chunk debug view show wether a border is crossing a contourline
Just keep the last changed on Contourline, even though it might not be used
Start covering edge cases for ContourlineMap with polyogons with more than 2 borders affected
For now calculate contourlines for the whole map
More fixes for ContourlinesMap, getting decent lines now