Resolve "doc shallow water flux"

Closes #924

See merge request !2234

Added some hints to explain that the shallow water Riemann problem works in
2D only. The exact Riemann solver is 1D only and the problem is rotated.
The scvf.area() is given in m.

Add the units of the water flux and momentum fluxes in the documentation.

Add a new opts file that can be used for Docker builds

Closes #919

See merge request !2232

[basegridgeometry] Allow use of SingleCodimSingleGeomTypeMapper

See merge request !2218

Feature/doc flux laws

Closes #904 and #905

See merge request !2221

[newtonsolver] Use virtual function to update the gridVars after an update of the solution

See merge request !2205

Kilian Weishaupt authored 4 years ago and Ned Coltman committed 4 years ago

* use std::clamp
* clean up docu
* clean up includes

[test][channel] Add stationary version and analytical solution.

Closes #838

See merge request !2228

Freeflow/cornervelocity

Closes #890

See merge request !2163

Melanie Lipp authored 4 years ago and Kilian Weishaupt committed 4 years ago

In advective flux terms, there sometimes exists a corner velocity in a non-dof
position, in which a velocity is needed. This commit aims at using this existing
velocity instead of doing upwinding.

[handbook] Remove installation description with tarballs

See merge request !2198

update phusion base image to 18.04

See merge request !2220

Feature/tests convergence 1p aniso

Closes #907

See merge request !2223