Mnemosyne 2.4 has been released today [1]. I've tried to package it and you can find my changes to the debian directory on GitHub [2]. Unfortunately, mnemosyne 2.4 fails to start as it depends on QtWebEngine which isn't packaged yet (see #841830).
[1] https://groups.google.com/forum/#!topic/mnemosyne-proj-users/YE5-bMfOp4Y [2] https://github.com/felgru/mnemosyne
