In http://blog.maps.me/2014/12/full-version-of-mapsme-becomes-free-and.html it write that “Full Version of MAPS.ME Becomes Free and Open Source” and “Besides, the app will become open source in 2015”.
Is already open source repository or not yet?
Also, http://forum.openstreetmap.org/profile.php?id=7504 is part of maps.me team.