Fix/various small

See merge request !2485

Installdumux.py with dumux and dune versions as a command-line options

Closes #992

See merge request !2481

[shallowwater][diffusion] add turbulent diffusion to shallow water

Closes #706

See merge request !2243

[pnm] Improve grid generation

See merge request !2483

assemble matrix only once in the linear pde solver

See merge request !2239

Bernd Flemisch authored 4 years ago and Timo Koch committed 4 years ago

So far, the `LinearPDESolver` (re)assembles the matrix in its
`solve` function unconditionally. This might be unnecessary if the
matrix did not change compared to the previous call to `solve`.
Make a first attempt to avoid the unnecessary calculation by
adding a corresponding control flag.

Feature/box scvf num outside scvs

See merge request !2469

Fix/pnm gridgeo

See merge request !2482

[md] Add multidomain convergence writer

See merge request !2475

Feature/pore network model

See merge request !2208

Timo Koch authored 4 years ago and Kilian Weishaupt committed 4 years ago

The standard library distributions use implementation defined algorithms
which make them produce different random numbers on different library version
(different compiler versions or systems).
We use here now our own implementation which should have a high enough
quality for this purpose and it makes the tests reproducible.