Consolidation with CDI-PIO (develop)

Generally, this is !11 (merged) rebased onto the develop branch.

This is the first develop-based version accepted by the Buildbot of ICON: https://buildbot.dkrz.de/grid?branch=m300488/cdi-pio-2-integration

contrib/000link_all_deplibs-patch/README.txt

+This patch is borrowed from the Debian project:
+http://deb.debian.org/debian/pool/main/libt/libtool/libtool_2.4.6-15.debian.tar.xz
+
+The comment for the patch in the aformentioned archive says:
+## Do not link against deplibs.  This is not needed for shared libs
+## on atleast ELF systems since those already know which libs they
+## need themself.  This seems to break a few things and will be fixed
+## in a better way in a future upstream version.