permeability tensor (not only scalar) is written out in initialization output
- Upwind direction in the mpfa case is now only set on unique intersection
- Upwind direction in transport considers sign of potential and not information of the fluxdata, as in the adaptive case the latter might not be correct
- Increment in pressure (for derivatives in fluid volume) is now private variable of the pressure model. Change of its standard value might alter test results
reviewed by Philipp

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@12400 2fb0f335-1f38-0410-981e-8018bf24f1b0