v0.6.7

Full Changelog: v0.6.6...v0.6.7
Or see fastlane changelogs for user-friendly changes.

This is probably the last release as "ViMusic". Thank you all for the support and helpful feedback. In the upcoming days I probably won't add any new functionality. In order to deliver a stable application I'll only respond to critical bugs etc, since it already took way longer than I wanted (because of personal reasons).