0.26
 - install ubuntu cloud image keyring into /usr/share/keyrings/
 - ubuntu-cloudimg-query, ubuntu-ec2-run:
   - be aware of m1.medium instance type
   - support "amd64 on all sizes"
   - be aware of hi1.4xlarge
   - always pass block device mapping for sdb if instance type has it
     rather than relying on ami registration.
 - when downloading images use wget dot:mega for less verbose
 - growpart:
   - use 'sfdisk --no-reread' (LP: #942788)
   - if sfdisk fails, send output to stderr
 - cloud-publish-tarball: fix for tarballs without a ramdisk
 - ubuntu-cloudimg-query: allow baseurl to be read from environment var
 - growpart: support growpart of nbd devices (/dev/nbd[0-9]) and
   /dev/loop devices.
 - add cloud-localds utility
 - ubuntu-cloudimg-query: add 'serial' to tokens availble for substitution
