This release is more or less a complete rewrite with many improvements:
- SudokuFX uses JavaCV
- got rid of overcomplicated usage of Scala Future's
- improved image recognition by tweaking used templates
- improved visual appearance by a smarter approach to overlaying empty cells with numbers, not replacing them
- better memory and CPU utilisation
- Changed versioning scheme to use revision / changelist
- Upgrade to JavaFX 15-ea+4
- Upgrade to Scala 2.13.3
- many other small improvements and bug fixes ...