Fix/periodic box

Closes #934

See merge request !2256

* make sure the second dof has the same value as the first one

Feature/modify loadsolution

See merge request !2226

Ned Coltman authored 4 years ago and Timo Koch committed 4 years ago

* Loads in solution from rans2c for a rans2cni test
* Tests rans2cni faster, plus loading a partial solution for ICs

Update CHANGELOG.md

See merge request !2255

[porousmediumflow][velocity] Improve calculation in case of Neumann BCs

See merge request !2129

* check if we have non-compositional model
* estimate the volume flow by neumannFlow/density

[porousmediumFlow] Export indices in all volVars

See merge request !2229

[docu][freeflow] Improve rans oneeq docu.

See merge request !2251

[material][2p] Move thermalconductivity laws to their own folder

See merge request !2249

[md][embedded] Fix CMakeLists.txt

See merge request !2247

[common] Add inverse of monotone cubic spline

See merge request !2250

* Add missing header

[basegridgeometry] Use more robust way to choose ctor of mappers

Closes #932

See merge request !2245

* use std::is_constructible

[readme] Update link to class documentation

See merge request !2242

[common] make sure dt != 0 in timeloop

Closes #928

See merge request !2237

- don't insert checkpoints at current time
- warn when dt set to 0 and not finished

[cleanup][test] Rename test_md_embedded{dims} to test_md_embedded_{dims}

See merge request !2241

Fix/cc internal dirichlet

Closes #929

See merge request !2240