[install] check cgal presence via cmake

See merge request !12

[install_script] use higher dune version

See merge request !11

[README] improve docker section

See merge request !10

Feature/reincorporate-tpfa-circ

See merge request !9

Feature/improve readme

See merge request !8

[README] mention darus dataset

See merge request !7

DaRUS publication

See merge request !6

The container entry point does not consider the mmesh-implementation,
anyway.

In the DaRUS publication, the Dockerfile is provided as part of the
dataset, outside the source code directory