Thank you for putting v2-beta notes in readme

I don't think there's anywhere else to say this, but you made me really happy by putting the v2 notes right at the top of the readme. 

Somebody just submitted a PR to our workflow to upgrade to v2-beta. Reviewing PRs is often a pain, but finding these notes so easily made it a lot better! 

Thank you! 

(I'll close this bug so those getting it via email don't have to load the page.)