3d XRD data modeling

[sanbrock]

• Panalytical
• Bruker
• Rigaku
• BESSY
  also ALBA, IUCr-DMI

[domna]

Draft is in development in PR #35
The next step for me is to extract the data from Bruker and Rigaku files and try to write an example nxs file with it to see which metadata is missing.