Release notes for MuseScore 2.2.1

After the release of MuseScore 2.2 on March 27th 2018, we found a couple of regressions that we addressed in MuseScore 2.2.1 released on April 3rd 2018. We also updated all languages to latest translations.

Bug Fixes

• Fix #270803: [Regression] Messed playback in the score
• Crash reported in #270748: [Regression] Playback slow to engage, when starting playback too quickly after load score
• Fix #270878: [Regression] MIDI fixup for overlapping note shouldn't kick in for different midi tracks
• 2.0.x score gives synthesizer output artifact with new soundfont

See also the Release notes for MuseScore 2.2.