[test][facet][1p] remove obsolete copied line in CMakeLists.txt

See merge request !1242

link to LICENSE.md from README.md

See merge request !1240

[properties] Add property system implementation without macros and variadic templates

See merge request !1211

[2p2c][sequential] remove `template` from call to nontemplate functions

See merge request !1238

[params] Make it possible to initialize parameters when not called from main

See merge request !1222

* Adjust old macro test to only use existing macros
* Depracate the header containing the macros (they should be replaced soon)

Clues when changing to new property system
* NEW_PROP_TAG is now a definition and can only be there once just like NEW_TYPE_TAG
  - if you're not using macros you can simply use forward declarations of properties whereever needed
  - for the most properties in dumux the definition is in the header common/properties.hh which can just be included
* The order of precedence in INHERITS_FROM is reverse than in the previous implementation
  - if the macro is used the order is flipped
  - if you replace the macro you also have to flip the order manually

* makes calls to NEW_PROP_TAG unique which will be required by the new property system

[test][python] Do not open in binary mode

See merge request !1237

[test][python] Fix equality test

See merge request !1236

Fix/periodic boundaries

See merge request !1233

output of default parameters used

See merge request !1228

[porousmediumflow] Port Forchheimer

See merge request !1230

* only works for cctpfa with diagonal permeability tensors so far

A new possibility to enter diffusion coefficients user-specific if desired

See merge request !1232

[freeflow] Remove wallFunctions from common problem

See merge request !1217

* move to RANS problem

Feature/periodic boundaries

See merge request !1097

[feature] add restart facility for mpnc

See merge request !1210

Fix/various clang warnings

See merge request !1229