This avoids truncating long titles/albums/etc.
Author: Felipe Sateler <fsateler@debian.org>
Reviewed-By: Dmitry Smirnov <onlyjob@member.fsf.org>
Thanks-To: Rogério Brito.
Bug-Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=676478
* Look for `mid3v2` first and fallback to `id3v2` according to their availability.
* Added error message if neither of them found.