xml2guido: adds hidden bar inference from xml for Guido
xml2guido: adds hidden bar inference from xml for Guido

grame-cncm/libmusicxml,grame-cncm/libmusicxml,grame-cncm/libmusicxml,grame-cncm/libmusicxml,grame-cncm/libmusicxml,grame-cncm/libmusicxml