Bugfixes
Big fix:
- tensor math had some mistakes. Now fixed. The functions will now produce slightly different (but correct) results.
Multiple small bugfixes:
- rect and cuboid did not properly umber MaterialIDs
- rect and cuboid now can properly be meshed with an unstructured grid
- Mesh class now also respects field Data when read from xdmf
- to_ip_point_cloud removes some keys from field_data before conversion as the corresponding OGS CLI tool will fail otherwise
- conversion with msh2vtu produced MaterialID of -1 if the given .msh has only one PhysicalGroup of ID 0. Now correctly fills in as 0
- probe function didn't work for single points. Fixed
- fix plot.contourf levels in the case of vmin == vmax