MusE 3.0.0 released

Three years after the last stable release, version 3.0 of the MusEMIDI/Audio sequencer is now available. As you might expect there manychanges since the last release including a switch to Qt5, a new Plugin Patheditor in Global Settings, a mixer makeover with lots of fixes, asystem-wide move to double precision of all audio paths, and much more.