* Improve coding style
* Remove useless code comments
* Hide legacy providers by default
* Add Tekstowo to have at least one functioning provider for lyrics again
* Enable query logging only if an environment variable is set
* Use Tekstowo in example JavaScript
* Expose PositionInSet as Object (that is still convertable to String)
* Allow assigning field values directly without having to have a
TagValueObject and without having to have an Array