ubuntu-image 0.15

[Barry Warsaw]

ubuntu-image 0.15 has been released to the snap store beta channel, and
uploaded to Zesty, Yakkety, and Xenial.  The debs are working their way
through the autopkgtest infrastructure, and of course Y and X will also have
to go through the SRU process.  The snap is available now.

This is a bug fix and feature release.  I'm considering it a release candidate
for a 1.0 version.  If you've been wanting to create gadgets with multiple
volumes, now's your chance.  Each volume in your gadget.yaml now produces a
separate disk image file, named after the volume.  As such, we're deprecating
the -o/--output cli option in favor of -O/--output-dir.

Also, thanks to Łukasz Zemczak, ubuntu-image now supports sizes and offsets
less than 1MiB, although you get a warning if either is not a multiple of the
sector size.  Because of the tools available to us, that limitation is still
in effect, and such values will be rounded up to the nearest sector boundary.
Typically, the sector size is 512 bytes.

The snap version of ubuntu-image still has a few restrictions that the deb
versions do not.  You cannot have models or extra snaps in /tmp, and you
cannot write image files to /tmp.  You'll get warnings in both cases.

Release details:

https://launchpad.net/ubuntu-image/trunk/0.15

As always, please let us know if you find any problems:

https://bugs.launchpad.net/ubuntu-image

Contributions welcome:

https://github.com/CanonicalLtd/ubuntu-image

Enjoy,
-Barry