Updates:
- Subsonic API: added scanner control commands #62
- Added some more diversity in the tag-based recommendation engine when results with the same score are found
- Better detection for embedded covers in vorbis and opus ogg files #71
- Handle priorities for cover files (same as track's filename, then "cover", then "front", then remaining files in the directory)
- Scan files which supported extension is not in lowercase ("Mp3", "MP3", etc.)
Bugfixes: