Add artifact manifest license header (#548)

Match LICENSE file.

Relese v0.3.3

Relese v0.3.2

Version 0.3.1

Version 0.3.0

Version 0.3.0-beta1

Merge pull request #322 from jrasell/f-release-0.2.9

Prepare release 0.2.9

Merge pull request #300 from jrasell/f-release-0.2.8

Release version 0.2.8

Merge pull request #278 from jrasell/f-prep-0.2.7-release

Prepare Levant for release of version 0.2.7

Merge pull request #271 from jrasell/more-travis-fixes

Ensure travis Levant clone is clean for releases.