* this is the only test that failed after the changes in momentum upwind, thus the use of inertia terms is disabled
* use fixed times to write output
* do some clean-up

[navierstokes] Improve flux variables

See merge request !745

Somehow the upwinding and changes in navierstokes led to an additional Newton step

* rename old test for low Re testing

* introduce upwind weight for momentum flux
* use convenience function to calculate all momentum fluxes
* rename computeNormalMomentumFlux to computeFrontalMomentumFlux
* rename computeTangetialMomentumFlux to computeNormalMomentumFlux
* move pressure term from  local residual to fluxVars
* use separate function to treat outflow boundaries
* improve docu and clean-up

* explicitly check for outflow BC
* small clean-ups
* improve docu

[impes] Remove grid singleton from problem

See merge request !773

Fix/mpfa assertions

See merge request !788

unite misciblemultiphaseconstraintsolver and miscible2pncconstraintsolver and…

See merge request !786

[doxygen][fluidsystems] Fix erroneous formula

See merge request !787

unite misciblemultiphaseconstraintsolver and miscible2pncconstraintsolver and deprecate unnecessary constraintsolvers. use misciblemultiphase now in all models

Rename Problem-TypeTags to end in TypeTag in folders test and tutorial.

Closes #413

See merge request !771

[fix] include all outsidescv things only when not on a boundary

See merge request !785

[feature/binarycoefficients-h2o-ch4] Moved binary coefficents for H2O-CH4 from devel to stable

See merge request !784

[fix] path to vtkoutputfields after renaming of folder

See merge request !783

[2p2c] fix construction of interaction volume

See merge request !782

Cleanup/nonequilibrium constraintsolver

See merge request !780

Feature/mpnc 2p2c comparison

See merge request !781

fix/adaptivity

See merge request !776

[test] use CMake guard for test requiring dune-foamgrid

See merge request !778

[linearSolver] Add version check to avoid deprecation warning

See merge request !777

[staggered] fix StaggeredNewtonController for use with Dune 2.5

See merge request !779