uvfits should have information about when it was created. about birli

[cjordan]

I don't think that History should be extended; the uvfits writer should simply write the new key with the current time.

[d3v-null]

I see the History object as being useful for reading rows out of the HISTORY table in ms, but you're right that we don't need to break the existing api for this feature.

[cjordan]

Ah, I see. Currently Marlu doesn't do any vis reading, but if/when it does, I think it'd be sufficient to have a trait method that grabs the creation time. Probably also trait methods for getting the "command", "application" etc. seeing as History is currently just a little container only for writing.