HadynFJ-O76: Replace copies of the source with symlinks
Update of HaydnFJ Op. 76
Haydn Op. 76 - Rename files

Change extension for included lys to .ily
Also fix a problem with the previous commit
Merge branch 'HaydnFJ-O76' of https://github.com/doughdemon/The-Mutopia-Project
Initial version of TroisNouvellesEtudes_Chopin_n1
Update footer
Correct minor -> major in title