Decide on and include standard properties for new files

[JamesWiresmith]

A separation of #29

There are references to the tdms library including standard properties files with reserved names.

These appear to be:

• name - the name of the file
• datetime - The creation time (https://www.ni.com/en/support/documentation/supplemental/12/writing-data-management-ready-tdms-files.html)
• description, title and author - Although I don't see these in reality.

We need to device on what to create automatically and offer easy methods for the other built-ins.

Based on a quick test loading TDMS files in I can only see the name property being written automatically. So we should probably match that and only include that as an automatic property.