Sync dune-common 2.4.1-1 and related packages (universe) from Debian unstable (main)

Please sync
    dune-common 2.4.1-1
    dune-geometry 2.4.1-1
    dune-grid 2.4.1-1
    dune-istl 2.4.1-1
    dune-localfunctions 2.4.1-1
    dune-pdelab 2.4.1-1
    dune-typetree 2.4.1-1
(universe) from Debian unstable (main)

This also requires rebuilding dune-grid-glue 2.4.0-1 (universe).

Some of the CMake scripts included broke with newer cmake versions
(which should include the versions in Xenial), making the packages
only usable with the (deprecated) autotools-based build scripts.

Some of the packages (dune-typetree, dune-pdelab) are pre-release
versions or snapshots. I would prefer if Ubuntu shipped a stable
release, especially for a LTS release.

Changelog entries since current xenial version 2.4.0-1:

dune-common (2.4.1-1) unstable; urgency=medium

  * New upstream release.
  * Mark libdune-common-dev as Multi-Arch: same.

 -- Ansgar Burchardt <email address hidden> Mon, 29 Feb 2016 10:19:18 +0100

dune-common (2.4.1~rc2-1) experimental; urgency=medium

  * New upstream release candidate.

 -- Ansgar Burchardt <email address hidden> Sun, 28 Feb 2016 13:18:16 +0100