Write "receipt" files on vtk file creation

[jrwrigh]

Whenever a file is written using bar2vtk, write a yaml/json file with the associated commands/files/information used to create the vtk file.

Also make available the option to read the receipt into bar2vtk to recreate the same file.

Items to be included in the yaml file:

• Date created
• Version number of vtkpytools (maybe also a git commit if possible)
• All the argparse options input to bar2vtk
  • Should also include non-argparse options like the path to the files used

[jrwrigh]

Probably use toml format for the receipt.

• pytomlkit - Python implementation
  • Maintains formatting, comment lines when reading
• pytomlpp - Python wrapper around toml++.
  • Faster than pytomlkit

[jrwrigh]

Also write "receipt" to the vtk file itself. See:

• VTK forum post on storing metadata
• Python example of FieldData
• See pyvista/pyvista#207 for pyvista implementation of FieldData