Make the file naming scheme configurable

[StefH]

Now it's always {track} {artist} - {title}

It would be nice if it's configurable.

[ajsnyde]

I'll get to work on that in the next couple of days.

[ajsnyde]

I made some super-simple configuration options available in the following pull request:
#20

[ajsnyde]

If you want any other options, let me know. I am 90% sure that the basics should cover your desires, but it's not too hard to add more complex tags.

[Otiel]

Thanks @ajsnyde, published a new release with your changes.