Bug#632854: python-mmkeys package no longer supported in quodlibet

[Adam Thomas]

as per this patch
https://code.google.com/p/quodlibet/source/detail?r=107ef7dcb8f033046a1e28b4aae49e87dcce98ea

quodlibet no longer supports the mmkeys package. Installing
gir1.2-keybinder-3.0 worked for me.

apt-get install gir1.2-keybinder-3.0