[md][stokesdarcy] Clean-up coupling mapper

Closes #764

See merge request !1825

* remove coupling mgr member variable
* pass mgr to function that acutally needs it
* remove unused code

Feature/doc parallel direct solver

Closes #785

See merge request !1793

[properties] Disable old property macros per default

See merge request !1802

Timo Koch authored 5 years ago and Kilian Weishaupt committed 5 years ago

Property macros are deprecated and will be removed after release 3.2

Resolve "[shallowwater] Add new friction law `noFriciton`"

Closes #789

See merge request !1813

[3p3c][localresidual] fix calculation of diffusive fluxes

See merge request !1819

Fix/master cmake backwards compatibility dune 2.6.0

See merge request !1767

localresidual. The diffusive fluxes add up to 0 only in the
mass-averaged system and then need to be divided by the molar mass

diffusive fluxes add up to 0 only in the mass averaged system and then
need to be devided by the molar mass of each component

is flux of the remaining phase only in the right reference system. That
is why this has to be calculated and then the units for all fluxes need
to be adapted

(cherry picked from commit 55fe98b1)

Fix/bjs velocity calculation

See merge request !1798

[doc] Improve example readme

See merge request !1809

[stokesDarcy][couplingData] Generalize pressure reconstruction

See merge request !1565

[examples] update readmes according to fvGridGeometry changes

See merge request !1808

[2p2c] add asImp_ for call of getFlux

See merge request !1794

FVGridGeometry and fvGridGeometry were renamed to GridGeometry and 
gridGeometry respectively. This updates the readmes for the examples.

[rotationsymmetry] Add convenience traits to construct radially symmetric grid geometries

See merge request !1804

[pointsource] Make computation more efficient by not copying vector

See merge request !1805

Feature/radially symmetric problems

See merge request !1803