- refactor build system and some classes to reduce redundant code
- remove QMake support
- fix misc bugs
- fix lots of bug in the underlying tag library (see tagparser)
- add approach for a MusicBrainz search (still experimental)
- allow querying cover from Cover Art Archive (still experimental)
- make web view and JavaScript dependencies optional
- provide tree-view-based file info as an alternative to the web view
- warn when opening Matroska files composed of multiple segments (because this is still not tested)
- show element structure of Quick Time files (tagging Quick Time files is not supported)
- allow opening files in read-only mode
licensing information for the Windows distribution: https://raw.githubusercontent.com/Martchus/tageditor/9d95bb975a84787fcd4b94dc5ca33674f1e34f39/LICENSES-windows-distribution.md