GeoMapper improvements

If the coordinates of a point managed by PointVec are modified from outside the internal data structures must be updated. I.e., the AABB needs maybe an update. But more important if the point is moved
in general it has to be moved also in the OctTree.

Functionality for writing CSV files

Changed directory name of MaterialsLib to MaterialLib

Made LIS linear solver return if it succeeded.

Fix AddTest

Fix dots in VTU file names

Added time measurement output

otherwise there are problems if some directory in the path contains dots in its
name.

no special behaviour if second path starts with dot
the old behaviour could cause problems with unix' hidden files or with parent
directories (..)