v0.2.2

Short summary:

• YM file support is now updated to original project StSound_1_43.zip
• GCC 10.x compile fix
• SDL/SDL2/X11 graphical GUI can now display MP3/ID3, OGG and FLAC embedded pictures
• MP3/ID3, OGG and FLAC tags are now displayed in the user interface
• nCurses/SDL/SDL2/X11 user interfaces can now render UTF-8 text (useful for tags mentioned above)
• Use a local fork of libsidplayfp, instead of the previous system installed libsidplay 1.x
• ALT-K help, no longer freezes the interface it is drawing above