v6.6 Beta 1 - Nov 19 2018
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[x] revised update routines, including:
- fix downloads below Lollipop
- fix installations above Oreo
[x] do not scan intermediate m4a files into the media library
[x] fix duplicated mp3 image tags into the media library
[x] add the 320k mp3 encoding option
[x] fix notification settings in API above Marshmallow