* Added 3 new songs and added new note type to musical_notes.h
Added Megalovania from Undertale, Kataware Doki from Kimi no Na Wa and La Campanella by Lizst to song_list.h
Added the breve (double whole note) and dotted breve note types to musical_notes.h. I included this because the default tempo is quite high, so I thought a note with higher
duration was needed
* Fixed indentation for new notes in musical_notes.h
Changed tabs to spaces in indentation
* Get audio working on clueboard/60
* add keys for music mode
* Change doubles to floats
* add keys for all the songs
* revert to the default startup sound
* Remove music mode until we can figure out why it crashes
* Clarify the license for files we have signoff on
* Update against the currently signed off files
* Remove unused and not clearly licensed headers
* Replace an #endif I accidentally removed while resolving merge conflicts
