exilief

Ok, I started decoupling some parts (still needs testing), but there is a problem with `psMaterial`. The GAS enum value is used as a default value (`bulkMaterial` in `csSegmentCells`, for...

I changed the psMaterial to int, but in the oxideRegrowth example the gas layer was missing now, because in `csDenseCellSet::updateMaterials()` it loops over the level sets, but for the added...