Reverted commit 7624 according to release manager and PFP. Too many undiscussed changes after soft feature freeze. Can be discussed on Monday at the Dumux coffee at 9.30 h. Decisions made there are binding.

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@7627 2fb0f335-1f38-0410-981e-8018bf24f1b0