Merge pull request #13 from arioch/master

When upgrading service should be notified
[blacksmith] Bump version
Update README.md
Merge pull request #14 from thijsdezoete/patch-1

Update README.md
[blacksmith] Bump version to 2.1.6
add travis-ci configuration
provide missing variables for ci build
Merge pull request #15 from rkcpi/travisci

Provide .travis.yml