Allow 110Hz tones
Lower sounds must have a greater amplitude in order to have the same
energy
2 harmonics added to the sine wave
Vario improvements
Vario repeat parameter added
dTE added as a Vario source. Still not added the algorithms to take it
into account, we don't have any dTE capable sensor yet
Vario experiments around tone/silence ratio. Now (100% / 75%-50% linear
/ 25%)
Companion import/export for new vario parameters
Vario: allows a refresh of tones frequency / duration every 10ms
A little bit expo (x^2) in repeat frequency
Vario bugfixes
Vario part in Global Settings page reworked
4 stages mixer. Now vario can be used with a background music!
Now the Ele stick can be used for tests when vario source is dTE
Compilation error (thanks Jenkins)
1000bytes RAM saved
Different harmonics. Seem to be better. I would say that:
- all beeps from the radio need to be lowered.
- perhaps the low frequencies don't need to be amplified any more?
Merge remote-tracking branch 'origin/next' into
bsongis/vario_improvements

Conflicts:
	radio/src/maths.cpp
Merge remote-tracking branch 'origin/next' into bsongis/vario_improvements
Merge remote-tracking branch 'origin/next' into bsongis/vario_improvements