Overloading inhibits the static assertion in the base class to jump in

Exchangeable-upwind-scheme

See merge request !877

this also has the benefit that the base class is getting smaller with
the upwind scheme not being in it. Staggered, for example, does not use
an upwind scheme and thus always carried an invalid upwind scheme implementation
with it...

[io][1p][freeflow] Use correct phase name for velocity output

See merge request !874

[headercheck] Fix headercheck and remove warnings related to ";;"

See merge request !873

[maxwellstefan][rans] Make Maxwell-Stefan applicable for turbulence models and simplify calculation

See merge request !875

Freeflow/ransncni

See merge request !867

features
* tests for zeroeqni and zeroeq2cni
* split update() in "classical" update() and updateRANSProperties()
* do not use asImp_() but virtual inheritance
* cleanup

Freeflow/cleanup

See merge request !868

Freeflow/ransnc

See merge request !866

* ransnc uses now nPhaseIdx = 1

navierstokes
* make vtkoutputfields more modular

rans
* move eddyViscosity functions to the specific rans implementation

* better distinguish between total mass balance and component mass balances

Feature/gnuplot pipes

See merge request !872

Freeflow/roughness

See merge request !862

* do NOT use updateStaticWallProperties() in problem constructor
* correct calculation of maximum velocity
* add Laufer velocity profile
* update wall variable names

[misc] Fix "coeffiecient" typo

See merge request !863

[cleanup] delete unused simplesteamaircao2h2.hh fluidsystem

Closes #465

See merge request !865

[fix] update dune version control in constraintsolver to master

See merge request !864