* Remove empty constructor
* Remove wrongly included config.h which is only needed in cc files
* Remove else after return in if branch

Cleaned up version is easier to understand

Fix/3p parker vg



See merge request !97

*The equation actually uses sn instead of sne

[richards] fix parallel test

Commit 219dd9 defaulted the linear solver to a sequential one. Since
the box Richards test is running in parallel, a parallel linear
solver has to be set. The AMGBackend gives slightly different results
above the fuzzy threshold. Therefore, also the reference solution is
adapted.

See merge request !100

Commit 219dd9 defaulted the linear solver to a sequential one. Since
the box Richards test is running in parallel, a parallel linear
solver has to be set. The AMGBackend gives slightly different results
above the fuzzy threshold. Therefore, also the reference solution is
adapted.

Feature/fs289 fluidframework doxygen

The Chapter fluid-framework is transferred to Doxygen.

- Explanations have been added to modules.txt 
- Function documentation for fluidstates, fluidsystems etc. transferred to header files. 
- Use of copydoc for general function doc.
- Rename handbook chapter Fluid-Framework to Material and Fluid Framework
- Replace content from Chapter in Handbook by reference to Doxygen module

Thanks to Martin Beck for contributing!


See merge request !99

corrected the documentation for setFugacityCoefficient in the compositional fluidstate.

[sequential] replace decoupled by sequential

Replace the word "Decoupled" in TypeTags and classes by "Sequential",
according to FS#252.

For both the TypeTags and the Decoupled...Indices classes, the compilers
don't emit a deprecation warning. For the TypeTags, a run-time check is
performed at the end of the start() routine.

See merge request !98

Replace the word "Decoupled" in TypeTags and classes by "Sequential",
according to FS#252.

For both the TypeTags and the Decoupled...Indices classes, the compilers
don't emit a deprecation warning. For the TypeTags, a run-time check is
performed at the end of the start() routine.

Feature/update handbook 2.9



See merge request !95

* Rename coupled to implicit
* Rename decoupled to sequential

Modified formatting of descriptive text.

- Rename Fluid Framework to Material and Fluid Framework
- Removed content by reference to Doxygen documentation

- Documentation for all general FluidState get-functions derived from compositional.hh
- Documentation in compositional.hh take from handbook

[el2p][pengrebinson] Use the correct headers



See merge request !94

Fix accidentally pruned method name isCouplingInflow



See merge request !93

Fix/3p parker vangenuchten



See merge request !79

* Test now reaches the inhomogeneities.
* Introduced epsiodes to reduce vtu output
* Increase end time

[CMake] Add DUMUX_VERSION to config.h

Despite the feature freeze, I ask to merge this. It enables the use of `DUNE_VERSION_NEWER` for DuMuX. I need it in dumux-devel to distinguish a type that changed between DuMux 2.8 and 2.9.

See merge request !92

[test][CO2] Ignore vertex-wise defined porosity

Ignore the porosity for all box models since it is defined element-wise
in these test but the default 2p2c implementation outputs porosity per
vertex. Depending on the order of the elements, the porosity would
differ in these cases.

See merge request !91

[doxygen] add documentation and reorder modules according to new structure

improve documentation for 2pnc and 2pncmin model and add description for classes
rename modules (sequential...) and reorder according to new structure (porousmediumflow...)

See merge request !90

improve documentation for 2pnc and 2pncmin model and add description for classes
rename modules (sequential) and reorder according to new structure (porousmediumflow...)

Ignore the porosity for all box models since it is defined element-wise
in these test but the default 2p2c implementation outputs porosity per
vertex. Depending on the order of the elements, the porosity would
differ in these cases.

changed the dune version to the most recent (2.4.1) in the detailed installation section.

updated the version to 2.9, edited the quick installation guide and adapted the path to the models in the model descriptions.

Remaining "decoupled"s in the handbook were replaced by "sequential"

- Moved function doc from handbook to compositional FluidState
- Use copydoc for 2p2c FS functions from compositional FS

Adapted the new tutorial filenames in CMakelists.txt in order to make "make 0_dumux_handbook_pdf" work as before.