2.6.0

• 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
• • various bug fixes