Move everything about reading/writing tags from tagreaderworker to a new tagreader class.
Re-activate Song tests.
Ooops... I forgot tagreader files :/
Fix the build
Write FMPS metadata (rating, playcount) to MP3 files in tagreader + corresponding test cases
Handle statistics tags apart, and write them to file when they change.
Next step: add a preference to activate this (should be deactivated by default IMO).
Add preference to save ratings and statistics in files
Update tests
Use Qt's foreach instead of C++11 foreach, as it doesn't work with older versions of gcc
Add files
Fix refresh token issues with Google Drive.
Delete closures if the receiver is deleted.
Add track rating/score to OSD.
Fixes issue #2586
Compilling template.
Appear vk root item in 'internet' panel.
Read and write POPM tags
Add settings page
Read/Write FMPS tags for Ogg files
Save/read FMPS tags to/from FLAC using Vorbis comments + some refactoring to parse VorbisComments in a unique place, when possible.
FMPS support for ASF files
FMPS support for MP4 files
Use constants