create UML diagrams for the software

[franzlang]

investigate the structure of the MDANSE code and create a set of static UML diagrams, e.g. class diagrams, to document and represent the structure of the software.

[RastislavTuranyi]

Diagrams for MDANSE.Framework.Configurators as pdfs:

• Full diagram
  Picture

  
• Partial error classes diagram contains relevant error classes, but does not show that they are all subclasses of MDANSE.Core.Error.Error
  Picture

  
• No error classes diagram does not contain MDANSE.Framework.Configurators.ConfiguratorError
  Picture

  

Please let me know if you have any feedback on these.

Edit: added images that show static and abstract attributes and methods (text formatting of these does not show in pdf)

[RastislavTuranyi]

Diagram for MDANSE.Framework.Formats as png

[MBartkowiakSTFC]

This will have to be re-done for the Python 3 version.