implement all basic tags directly provided by taglib for the taglibwriter
- R286:0f16dd4d4cbf: implement more basic tags for taglibwriter
I plan to extend the tests in a later patch, if you don't mind, I would prefer to add this there.
I have that on my todo list to switch to taglib's builtin functions
taglib only allows unsigned int for year and track, so I don't know how that's possible with taglib.