Made capitalization changes in the filenames and added attribution-level
"attribution".

--HG--
rename : Jos2002-Magnificat_tertii_toni.krn => Jos2002-Magnificat_Tertii_toni.krn
rename : Jos2004-Magnificat_quarti_toni-Verse_6_Fecit_potentiam.krn => Jos2004-Magnificat_Quarti_toni-Verse_6_Fecit_potentiam.krn