Rotate fluid inputs and outputs of buildings
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Is there an 1.1update in work?
Edit:
info.json line 4 change from "factorio_version" : "0.18", to "factorio_version" : "1.1",
Fluid Permutations 0.4.0 is for Factorio 1.1