Create automated tests

[EECOLOR]

In order to move towards a more professional package I would like to introduce a library like https://github.com/semantic-release/semantic-release. This library allows you to automatically set the correct version number based on the commits since the last version.

Another great utility is https://greenkeeper.io/ which helps us to keep the dependencies up-to-date.

These tools however require the tests to be automated and currently we are manually checking for smoke using the example. The library has stabilized enough for these checks to be automated.

I would suggest to use the documentation as a basis for creating the different use cases that should be tested. We could also check previous bugs (if they are still relevant) and add tests for those in order to not re-introduce them on new releases.