Welcome to the weekly development notes for snapcraft! This covers work from 03 September until 09 September of 2017.
What is this Zesty Zaurus of which you speak ? 17.04 is Zesty Zapus!
Talking of which, you should use the version name e.g. 16.04 LTS in favour of the codename once it’s been released see Ubuntu wiki for details.
Oh my! This a more common typo I make than you can imagine!