Fixed ADC analog drivers.
Changed airspeed drivers to use physical constants file.
Fixed space formatting in UAVOMavlinkBridge.
Fix runaway processor when analog sensor is configured as active input but
it has no enabled input pin.
Increased resolution for GroundTemperature.
Moved to using the atmospheric_math calculations.

Fixed several small bugs which had no effect (multiplying by 1 vs. dividing
by 1).
Added airspeed support to all targets.
Fixed missing target in FlyingF4 Makefile.
Several portTICK_RATE_MS fixes.
Fixed double promotion.
Merge pull request #669 from kubark42/airspeed-fixes

Airspeed fixes