Add buzzer functions and some documentation in the code
Remove old TODO
Add documentation to music.c and minor fix to MLDY_PAUSE
Rename music app
Add notes to buzzer functions
Add initial pentatonic support
Support more apps
Add buttons to pentatonic API
Save data memory
Revert "Save data memory"

This reverts commit 589275a3ba60d22ac40dd321cf04ef8e06009381.
Add IR to HAL
Merge branch 'master' of github.com:c3d2/pentabug