- drivers/tone_alarm: move to ModuleBase and purge CDev (/dev/tone_alarm0)
- drivers/tone_alarm: only run on tune_control publication (or scheduled note) rather than continuously
- drivers/tone_alarm: use HRT to schedule tone stop (prevents potential disruption)
- msg/tune_control: add tune_id numbering
- systemcmds/tune_control: add "error" special case tune_id
- move all tune_control publication to new uORB::PublicationQueued<>
- start tone_alarm immediately after board defaults are loaded to fix potential startup issues
- for SITL (or other boards with no TONE output) print common messages (startup, error, etc)