* Add the possibility to filter on line(s) in Västtrafik Public Transport sensor
Add a config entry "lines" to be able to filter departures on line(s) for the
vasttrafik sensor.
* Change log level to debug if no departures found.
* Remove extra None argument from dict().get() calls as it is already the default.
* Ensure "lines" is a list of strings. Also fix an indentation error.
* Correct to long line