arh3 reader corrected, especially the parh reader part
Rewriting of some functions in the ARH3 reader, partitioned meshes are now read from the PARH files directly and all the information about partitions is extracted from the PARH file.
Rewriting of some functions in the ARH3 reader, partitioned meshes are now read from the PARH files directly and all the information about partitions is extracted from the PARH file.