CMS v1.5 released

[William Di Luigi]

Hello everyone,

We just released CMS v1.5 and updated references to the stable version in https://cms-dev.github.io/

This release comes after a long pause, we're fairly confident it's stable as it was stress-tested during the latest round of training for the Italian IOI team. Please let us know if you have problems with it. We will try to release more often in the future.

Huge thanks to Luca Versari (newly-elected ITC member for the IOI) who helped a lot in preparing, reviewing, and testing this release!

Best regards,

William