Publishing v2 and v3 manifests at the same time for a single resource

[tomcrane]

Publishing v2 and v3 versions

(Provide link to index.md of the issue, if available. To be filled in after issue is created - you need the issue number!)

Use case

I want to provide Presentation 2 and Presentation 3 versions of my objects. How do I do this? (http considerations etc)

[tomcrane]

Discovery implications need to be considered too

https://github.com/IIIF/discovery/issues/46

[tomcrane]

And https://github.com/IIIF/discovery/issues/48

[tomcrane]

Discovery perspective (via @jronallo):

...one scenario which might come up is that a v2 manifest with seeAlso metadata may become static once we have reached the tipping point of v3 adoption. So at that point going forward only the v3 manifest and seeAlso metadata will get updated. So seeAlso not quite enough to ensure that they're the same.