ENH: Easy version parsing

Ready for review/merge @drammock or @rkmaddox. Realized it's nice to have this to know which version is currently checked out when finalizing an experiment.
Yeah, I thought about that, too. In principle it should actually be possible to do it so long as there's only one dimension across which broadcasting must be done, but the logic and code required to get that right isn't worth it for the minimal amount of effort it would save on the other end IMO.