- substantial bit rot accrued in 4 years of non-maintenance which made Reader unusable
- Reader now works reliably on public pages - or at least it _Works For Me™_
- Refactored a substantial part of the code to comply to the "current" (ha ha) Nextcloud API
- Dropped Owncloud compatibility for lack of a testing installation
- Dropped IE (<11) support
- Dropped compatibility with older (<20) Nextcloud versions
- Dropped app-specific ajax code, now handled by SettingsController
- Updated dependencies where applicable