Merge branch 'feature/spatialparams_python' into 'master'
Spatial parameters for Python bindings
Closes #1145 (closed)
See merge request !3069 (merged)
(cherry picked from commit 790bdaee)
8e464d6c [dumux][python][spatialparams] update the problem and spatialparams classes 2e25f728 [python][material] remove old spatial params files 56a3c69b [python] Make spatialparams optional and make separate modules in python/common 97d568bb [python] Make spatial params const again