Version 1.7.0

Version 1.6.1

Version 1.6.0

Version 1.5.0

Merge branch 'hotfix-fix121'

Release v1.2.1

Release v1.2.2

update version to use semver

initial version from http://www.mail-archive.com/[email protected]…

…nel.org/msg05623/btrfs-snap