Surface readouts: Biome, FAR fixes

Added Biome readout, Impact Biome readout
	display the Biome at the current position
	and the Biome at the predicted instant impact point (for example for suborbital hops on mun)

Added readout for FAR air density adjustment factor
	disabled by default; is always 1 if FAR is not installed
	relevant for adjusting drag coeff in aerocapture/aerobraking simulations
	the FAR air density adjustment factor depends on temperature and atmosphere composition,
	i.e. on planet and altitude.

Fixed FAR stock-equivalent drag coefficient readout
	this did not correctly consider the FAR air density adjustment factor

Fixed default values for settings
	far too many of the new surface readouts were on by default