docs: Update changelog for v0.15.0
Release v0.15.0
Bump version to 0.15.0
doc: Remove duplicate "Extension configuration" section in config.rst
Merge pull request #518 from ZenithDK/lb-test

doc: Remove duplicate "Extension configuration" section in config.rst
Merge branch 'develop' into tidy-up-core
Merge branch 'tidy-up-core' into tracklist-provider
Merge branch 'develop' into feature/audio-mute
Merge branch 'tracklist-provider' into feature/playback-error-notify
Merge branch 'tracklist-provider' into fix/handle-stream-metadata
Merge branch 'tidy-up-core' into metadata-provider
Merge branch 'develop' into mpd-playlist-management
Merge branch 'feature/playback-error-notify'
Merge branch 'fix/handle-stream-metadata'
Merge branch 'metadata-provider'
Merge branch 'mpd-playlist-management'
Merge branch 'feature/audio-mute'