Attribute reading

[xxirii]

Actual behavior

The plugin does not read all group and dataset attributes correctly. More attribute readers need to be implemented although the necessary ones for visualization are present. Some attribute readers are not working properly or may be improved:

• the label axis reader for meshes (see PMDField::SetAxisLabel) work in the assumption that all string have the same size. This is not necessary the case or codes need to be aware of this while creation pmd files.
• Similar issue for FieldBoundary and FieldBoundaryParameter

Expected behavior

• The reader should be able to read array of string with string of different sizes

Step to reproduce this behavior

• See output of corresponding methods (e.g. PMDField::SetAxisLabel)