[pm][ff] Improve indices, move into model traits, [pm] free volume variables from type tag
Loading
Moves indices into modeltraits
Removes TypeTag dependency from privarswitches
Removes TypeTag dependency from pm volvars
Cleans up vtk output fields
Introduces variable wettability for 2-phase models
Generalize fluid system indices not to fix wetting and non-wetting phase
See #448 (closed).