Added commonDirectoryPrefix util.
Correct order for "new music" query.
Various artist and singles handling is split-artists command.
Normalized country codes. Support for a band actually called
"Various Artists".
Use one transaction to rollback artist changes that fail later.
Use AnsiCode.init
eyeD3 Ansi changes
--pdb debugging support
Origin slicing, nicer display, etc.
Artist split fixes.
Artist.checkUnique()
Split artists complete.
merge-artists