GitLab

* Moved `COPYING.md`, `CODE_OF_CONDUCT.md`, `CONTRIBUTING.md`, and `LICENSE` (download only) into user manual #177.
* Fixed formatting of GMSH command #177.
* Fixed various links in existing documentation.
* Updated link to user manual in CLI.
* Added hints on cook book to `README.md` and user manual index.
* Fix render of `README.md` tables in user manual.

Explain basics of random field generation and include two main use
cases, Miller-similar media and heterogeneous media. Add input files for theses cases and include excerpts into the docs.

Images are already uploaded to the DORiE repository Wiki.

Coverage compiler and linker flags are now appended to *all* targets
when the option is turned on. Use the option to enable coverage
reports in the CI pipeline. Adjust build job "needs" to make pipeline
run as fast as possible.

* Outline GitLab workflow.
* Add information on how to get an account.
* Mention Code of Conduct.

Building without dune-testtools leads to missing parts in the user
manual and now raises a warning on the index page.

* Add new deploy job creating an environment for every release branch,
  merge request, and the master branch.
* Add environment stop job removing the environment after it has been
  stopped (happens automatically if branch is deleted).

Run ODE tests now with upwinding options of FV and DG solver
where a change of the residual tolerance limit was not necessary.

Several adjustments were made to make applying local operator options
easier:
* Remove 'EXPERIMENTAL_DG_FEATURES' option. Settings in config file
  now apply by default.
* Move previously experimental options to 'richards.numerics' section.
* Rename settings 'method' to 'DGMethod' and 'weights' to 'DGWeights'.
* Fix typo: Rename OOB to OBB scheme (Oden, Babuska, Baumann).

* Include latest version of Google Test as Git Submodule.
* Link Google Test to all DORiE unit tests. This has no effect if its
  header file is not included.
* Enable testing in DORiE if dune-testtools is found.
* Update SimulationBase unit test to work with Google Test.
* Add Doxygen docs on unit testing.
* Update README.md.

* Update Dockerfile for base image
* Bump Docker base image to v1.2
* Update version info in README.md
* Update CHANGELOG.md

* Define a custom target for HDF5.
  - Link to dependent libraries.
  - Add CPP definition for parallel setup explicitly.
  - Remove runtime check for parallel HDF5 in 'dorie-rfg'.
* Set CMP0074 to NEW to allow usage of <Package>_ROOT variables.
* Link all dependencies to executables when calling DorieTesting
  CMake macros.
* Do not check for FFTW3.
  - Check is performed by dune-randomfield already, which also
    registers the lib to DUNE_LIBS.
  - Remove FindFFTW3.cmake.
* Raise minimum required CMake version to Ubuntu Bionic, v3.10.
* Use lowercase name `muparser` consistently.
* Update installation instructions for building HDF5 from source
  (MPI support dropped by Homebrew)
* Use `dune_target_link_libraries` for DUNE_LIBS only.

Update installation instructions for Ubuntu.
`pip install vtk` suffices for macOS.

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* Adjust toctree to have proper sections
* Add new doc pages:
  - Feature overview
  - Data I/O
* Add new doc section 'Introduction'
* Rename main file to `index.rst`

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Tests are Makefile targets

* Do not use DUNE CMake module for creating Sphinx docs anymore
* Create subdirectories: manual, python, cookbook
* Remove unused files
* Remove 'Guided doxygen documentation'
* Add symlink from doc/manual/ to README

-DDUNE_HAVE_CXX_OPTIONAL=OFF suppresses use of vendor implementation

Remove section on adding the `dorie` wrapper to the PATH variable
from the installation instructions.

* Mention required input files.
* PFG module is optional.

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- Add yaml-cpp to dependencies
- Update installation instructions

* Fix link for cloning repo, resolving #48
* Update link to Bitballoon docs
* Mention Docker Hub images in installation instructions

* Raise DUNE versions to v2.6
* Raise dependency versions to packages included in Ubuntu 18.04
* Remove badges
* Fix 'docker build' command with path to Dockerfile
* Update installation instructions for Ubuntu
* Move interactive Docker session further down