Evaluated solo specific tones file vs standard px4 tones files. The
only thing the Solo had that standard ArduPilot does not have is the GPS
unplugged tone and the power off tone.
* Some tones have a different tune, which is fine. We want the Solo to
sound like ArduPilot if it is running ArduPilot.
* GPS unplugged tone abandoned. Determined to be unnecessary.
* Power off tone merged into standard px4 tones file. Smart battery
signalling a power off will make use of this tone. Has application for
any smart battery equipped vehicle, not just Solo.
* Removed all references and dependencies to `ToneAlarm_PX4_Solo.cpp`
and `ToneAlarm_PX4_Solo.h`
* Deleted `ToneAlarm_PX4_Solo.cpp` and `ToneAlarm_PX4_Solo.h` since
they're no longer needed.
This commit changes the way libraries headers are included in source files:
- If the header is in the same directory the source belongs to, so the
notation '#include ""' is used with the path relative to the directory
containing the source.
- If the header is outside the directory containing the source, then we use
the notation '#include <>' with the path relative to libraries folder.
Some of the advantages of such approach:
- Only one search path for libraries headers.
- OSs like Windows may have a better lookup time.