* before, fluxes were called for each eqIdx

Kilian Weishaupt authored Mar 06, 2019 and Ned Coltman committed Mar 11, 2019

* use small indicies for loops
* do not query for dofs using < 0 to check if they exist
* remove superfluous this-> calls
* use efficient types, clean up loops
* move axis and pair data to namespace Detail

* suppress compiler warning

Ned Coltman authored Feb 05, 2019 and Timo Koch committed Feb 26, 2019

[fluxvariables][gridfluxvarscache] adapt the fluxvariables to check for higherorder via the gridfluxvarscache, not the problem

Ned Coltman authored Dec 18, 2018 and Timo Koch committed Feb 26, 2019

[higherorder] expand the geometry, stecil, and flux calculations to include higher order flux limiter methods

* remove deprecated functions
* remove debug output

Kilian Weishaupt authored Jan 29, 2019 and Ned Coltman committed Feb 14, 2019

* ni models did not inherit from their non-ni base models,
  thus the wrong local residual and fluxvars were used (navierstokes)

* treat fluxes over boundaries properly (Neumann fluxes
  were not considered before)

* simplify volume flux calculation: just use v * A

* 2 Latex-errors and 2 ingroup-errors left