Edited music.txt

Changes to be committed:
Merge branch 'coffee' of https://github.com/yale-stc-developer-curriculum/favorites into coffee
Merge branch 'coffee' of https://github.com/yale-stc-developer-curriculum/favorites into coffee
Merge branch 'coffee' of https://github.com/yale-stc-developer-curriculum/favorites into coffee
Merge branch 'coffee' of https://github.com/yale-stc-developer-curriculum/favorites into coffee