1.22-alpha1 release notes

[Curtis Hovey-Canonical]

I started this document a few weeks ago. Now that features are being
documented, the engineers are free to add to it. You don't need to
write perfect text, we will revise it later.
https://docs.google.com/a/canonical.com/document/d/1IPmXCwujtq8zZs9mlfps7wGcBYYv4MLC_8w2bN2CetQ/edit

-- 
Curtis Hovey
Canonical Cloud Development and Operations
http://launchpad.net/~sinzui