Patch v13.71

Balancing and fixes for animals

Various legs besides the body now have special requirements for the animal to have more than 1 set of limbs, to make them look more natural (already in the previous patch logs, but now it's working)
Sessile animals with moving juveniles now actually move to the ocean floor and stop moving as adults (thanks, Cody Beaver, Cringus Ringus, Spectator, Acarlis, mic biology!)
Idem for ocean floor walkers (thanks, Ancient Relic!)
Optimized species population size tracker in situations with many species

Grass is now removed from a cell when eaten (thanks, esportfrank!)
Wildfire now removes grass, and grass won't be able to grow there for a while
Plant subspecies will now always have the same color as their parent species, to make it easier to identify which plant is which species
Tweaked the chance of algae evolving into plants

Made max weights for flying and in particular gliding higher, so development of flight is more likely
Weight now increases with body size, making giant flying things less likely (thanks, Warlor-vir!)
Individual torso segments now have less influence on the final weight to compensate for the above
Now the 'halve weight' icons are used everywhere, so you can see the weight in more detail
Removed ugly floating points that could sometimes pop oup in the UI

Memory/savefile optimization: the game now prunes extinct subspecies that the player couldn't see anyway
Added support for automatic continental drift
When loading, fixed the explainer text about which formats are supported

Adding seasons and then hitting 'randomize all' no longer messes up the planet tilt (thanks, SethMMX!)
Plus and minus keys now also control zoom in the alga and fungus editors (thanks, Daruka!)
When dragging the 'slow moving tube feet' and 'sessile foot' body parts, they now have the correct color instead of white

Clicking a species in the cladogram view now shows a subtree starting from that species, making it easy to study part of very large trees