Working version of the grid adaptive 2p-problem. Caution: In all fv-files, the indexInInside() function has to be substituted by an own counter, if grid is adapted

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@6561 2fb0f335-1f38-0410-981e-8018bf24f1b0