Is there any git repository with the source code of otree? https://github.com/oTree-org/oTree only seems to contain examples and https://github.com/oTree-org/otree-core only contains a single squashed commit with a preview version (6.0.1b1) instead of the newest stable release on Pypi (which is 5.11.3). 

It would be very nice to have a public git repository to be able to contribute to the project.

I second this!