For playlists, only need to compare filename


git-svn-id: http://cantata.googlecode.com/svn/trunk@4476 b1e49159-3266-923f-9c3e-04f16369770a
No need yo emit dataUpdated when creating


git-svn-id: http://cantata.googlecode.com/svn/trunk@4477 b1e49159-3266-923f-9c3e-04f16369770a
Compare song's filename


git-svn-id: http://cantata.googlecode.com/svn/trunk@4478 b1e49159-3266-923f-9c3e-04f16369770a
In tag-editor, when onbtaining values to use for 'All Tracks' entry, don't  ignore empty fields.


git-svn-id: http://cantata.googlecode.com/svn/trunk@4479 b1e49159-3266-923f-9c3e-04f16369770a
When determining album year, ignore playlist files!


git-svn-id: http://cantata.googlecode.com/svn/trunk@4480 b1e49159-3266-923f-9c3e-04f16369770a
Show "(Various)" for disc and year fields


git-svn-id: http://cantata.googlecode.com/svn/trunk@4481 b1e49159-3266-923f-9c3e-04f16369770a
Need more than 1 item in order to have various items!


git-svn-id: http://cantata.googlecode.com/svn/trunk@4482 b1e49159-3266-923f-9c3e-04f16369770a
Better handling of various fields


git-svn-id: http://cantata.googlecode.com/svn/trunk@4483 b1e49159-3266-923f-9c3e-04f16369770a