v1.2.1-beta official beta release

If you encounter any problem, please check ongoing issues or fill a new issue here https://github.com/diyabc/diyabcGUI/issues

No installation required. Please check https://github.com/diyabc/diyabcGUI/blob/master/README.md for instructions.

Disclaimer:

• some bugs may remain with advanced usage (see list of ongoing issues), we are currently working to fix them.
• The Synthetic data file generation module is not working, please use the previous release (v1.0.14-beta) if you want to generate pseudo-observed data file. The full pipeline for DIYABC-RF (training set simulation and random forest analysis) should however be working.

Change log:

• fix multiple bugs
• analysis project organized by tabs