[properties][cleanup] deprecate property GridView and replace by GridGeometry::GridView or Grid::LeafGridView

Gabi Seitz authored Apr 02, 2020 and Ned Coltman committed Apr 03, 2020

and adapt the problem files and the README

EnableGridGeometryCache

Reflect the change introduced by commit 83fe871a to the Dumux master.
Prevent deprecation warnings.

[course][exercises][naming] adapted towards the general naming conventions, unified naming of files and executables for the course

[course][exercise][biomin] problem: corrected sign of eps_, Readme: commented on neglecting NH4 and removed wrong explicit line numbers

removed TypeTag ending

-updated to dumux 3.0
-added a build-directory for the solution

changed to
box.hh
cctpfa.hh
ccmpfa.hh