Updates from G Madariaga

[jamesrhester]

G Madariaga has supplied extensive updates to the dictionary. Note that some definitions rely on additions to templ_attr.cif that have not yet been merged.

[jamesrhester]

CI checks will not be successful until templ_attr.cif has been updated.

[vaitkus]

I tried running some checks on this PR with the updated version of the templ_attr.cif file (see COMCIFS/cif_core#508). I suggested some changes to the template and a separate PR (see jamesrhester#1) to resolve most of the issues flagged by the formal validation. However, one issue still remains.

The _description_example.case in the _cell.commen_supercell_matrix save frame is given as a free-form text field while the validator expects it to be a vector, e.g. be a valid value that could be assigned to the _cell.commen_supercell_matrix item. I am unsure what is the best way to resolve this. Maybe the text part could be moved to the _description_example.detail data item of to the category level examples altogether.

Issues flagged by the cif_ddlm_dictionary_check script are a bit too numerous so it might be better to merge both the templ_attr.cif and the this PR and address them in subsequent cleanup PRs.

[jamesrhester]

I am withdrawing this pull request in order to start again from the latest version and to incorporate later updates from @gmadaria