New version of the program.
Continuist at user level with the previous one, but with great internal changes.
This new version has been mainly tried:
- Update the code to a current version of the compiler, from python 2.7 to python 3.7 (based in a previous work of Alfonso Solbes).
- Update the graphic library, from version 4 to 5 of qt, via pyside2.
- Improve folder organization, with Linux support in mind.
- It is incompatible with Windows XP.
- The data is not compatible with previous versions of Lucas Chess.
- The weight of the installer has doubled, currently around 120 Mb and the disk installation occupies 338 Mb.