File attributes

[Charles Nunes]

Please add %size% for the file size and other file attributes
Perhaps consider extracting infor from .kar karaoke files
%kt% title
%ka% autor, etc.

[antp]

I could easily add %size%, I'll try to not forget to do that for next version.
But for .kar files I would first have to check what's their format. I guess it is a well known format (I've often seen these files)