update semver

updating .semver and changelog.md

Merge branch 'master' of https://github.com/CakeDC/migrations

Update CHANGELOG.md

Update CHANGELOG.md

Merge branch 'develop'

* develop:
  Update .semver
  Update CHANGELOG.md
  Added example to set a specific datasource on run

Merge pull request #217 from steinkel/hotfix/travis

Hotfix/travis