- new class WPSSTM_Music_Data
- tracklist expiration bugfix
- improved importer and its settings
- improved shortcodes
- importer debug GUI
- bugfix populate sources/autosources
- fix files dependencies when no API key
- Last.fm : fix url encoding / fix regexes / fix importer / scrobbler disabled by default
- abord autosource if 'wpsstm_autosource_input' returns an error
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- various bug fixes