Releases?

[GordonSmith]

It would be useful if this repo had releases + versions, especially for the ABI.

[lukewagner]

Yes, that's a good point. We're addressing this now by saying that (1) we're not making breaking changes to the binary format or Canonical ABI and (2) anything that is not part of 0.2 is gated by an "emoji" beside it (particularly in Binary.md, where it provides a pretty clean cut point). But once we get to 0.3 (and ungate the next batch of features), it would definitely be helpful to have tagged releases to classify what came in with 0.2 vs 0.3 (and probably before that too).