Fix/run selected tests

See merge request !2615

Resolve "Two unreachable code sections"

Closes #1030

See merge request !2609

[master] Bump version to 3.5-git

See merge request !2610

Debug sequential 2p models for Buckley-Leverett and McWhorter

See merge request !2608

Resolve "test_mpfa2p.cc broken with Clang 12"

Closes #1029

See merge request !2606

[2p][sequentical][mpfa] Remove forward declared LinearMaterialDefault and correct the pcSwCurveIsLinear

GeometryTypes::cube instead of CubeTopology

See merge request !2602

The latter is deprecated in dune-geometry 2.8-git

[ci] do not stop building after failing build

Closes #1028

See merge request !2603

Feature/python createdockerimage script

See merge request !2231

[docker] set git user e.g. for applying patches

[math][invertCubicPoly] Improve doc. Add possibility to specify...

Closes #1025

See merge request !2599

[test][math][invertCubicPoly] Increase tolerance. If fails try once with more iterations to increase precision.

[math][invertCubicPoly] Improve doc. Add possibility to specify post-processing Newton iterations to increase precision

fix/3p-tests-on-minimal-setup

Closes #1026

See merge request !2601

On minimal setups where UMFPack/SuperLU are not installed, this test
fails as AMG then uses an iterative solver (as fallback) with a too soft
convergence criterion.

On minimal setups where UMFPack/SuperLU are not installed, this test
fails as AMG then uses an iterative solver (as fallback) with a too soft
convergence criterion.

[amg] Add warning for minimal setup without direct solver

Closes #1023

See merge request !2598

Update changelog for 3.4

Closes #1020

See merge request !2591

Feature/pnm noncreepingflow

See merge request !2596

Add more stuff, squash into other commits

Handbook section on scripts

Closes #1019

See merge request !2587

[test] Remove symlink to removed folder

See merge request !2589

[richards][localres][analytic] Fix detector for robin derivatives in problem

Closes #1024

See merge request !2595