Fix notice on attachment view
Fix streaming URL on non-standard upload dir
Playlist fix for empty tracks
Add artist cpt
Fix options for artist cpt etc
add metabox, fix metabox naming
Fix for empty meta
Finish artist metabox
API: add artist + artist_url to playlist
JS: Allow reordering of label
add stereo_label_order filter
Add stereo_options filter

replacing stereo_label_order filter
Add the_stereo_artist
Fix default tracks