Check consistency of FluidSystems
We should go through all FluidSystems and check them for consistency (assumptions, simplifications, etc.) There seems to be a lot of copy and paste without physical justification.
Idea: separate FluidSystems into more "general" ones and "application"-type FS which are specifically tailored to a certain application.
Changes will likely cause failing tests so this needs discussion. Could be done on a Dumux Day or by a very talented Hiwi.