Bala

Copperbox revision 121.

I've removed the file AffiDecoInstances.hs - Affi and Deco instances are now in the module with their respective types.

Slight improvement for pitch spelling sharpening and flattening keeps the pitch letter but changes the accidental:

sharp (c natural) => c #
sharp (c#) => c##

This has improved pitch spelling for scales, but things aren't perfect yet:

Scale> afficher $ makeScale (flat g4) (mkIS "WWHWWWH")

"Gb4 Ab4 Bb4 C###########4 Db5 Eb5 F5 Gb5"