Reinstate sponges spawning as mature colonies, and match mapgen
colonies to expected end-state of natural regrowth. This should
make it harder to distinguish an "old growth" area where players
have been hanging around a long time from pristine sponges.
- Inhibit sponge colony growth beyond a maximum size. Players
will have to prune colonies (or, smarter yet, split them) to
grow more sponges.
- Allow sponge colony transplantation. Sponges near the "core"
of a colony (i.e. surrounded by more sponges) are more viable
and more able to survive the player's crude harvesting.
Pummel a sponge and it will release water if there is space
nearby, though it will be reabsorbed by the sponge in a few
seconds.
This CAN be used to wet other sponges (i.e. to have a managed
supply of water if working far from oceans) but CANNOT be used
to create infinite springs.
If the original sponge is removed (and there is no other sponge
to absorb the water) then the water will be removed as well.
