Update documentation to include data versioning

[torimcd]

Update documentation to explain how data versioning behaves. Include examples that demonstrate using the data version parameter.

[nikki-t]

Not directly related but can we also update the documentation on fields to be a little clearer and I think we may want to add some documentation on CRIDs - how Hydrocron deals with different CRIDs.

[nikki-t]

I also updated our internal documentation with a checklist of items we need to modify to support new collections. @torimcd - Let me know if you see any gaps!