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

Gabi Seitz authored 5 years ago and Ned Coltman committed 4 years ago

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

removed TypeTag ending

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

changed to
box.hh
cctpfa.hh
ccmpfa.hh