GitLab

- Should be disabled when using inflow model because pressure is determined uniquely

- Always export PDF
- Is good for test coverage

- Allows for either float or cpp string containing phi, R, tau

- Usage of numdiff program rather than diff. This is because with the new inflow-model, some eorrors change slightly. We now compare with an absolute tolerance of 1E-10 because that works fine
- Installation of numdiff within Dockerfile
- Minor style changes in all input files

- Work nice with eps=10E-3
- But 10E-5 as initially in Mathematica NB does not work very well. Needs to be studied

- Reason is that latex docs fail because of "too deeply nested"

- Coupled system converges now

- and enable `environment = ["DOCKER_TLS_CERTDIR="]` in local Gitlab runner to test if CI is still working

This repo should now contain only the solver

- They are moved to masterthesis repo to have this repo only for the solver

- Can maybe used later to compare against torrilhon2013

See https://gitlab.com/gitlab-org/gitlab-ce/issues/64959