OSD_FrSky: send GPS altitude
OSD_FrSky: send home distance in meters as RPM
OSD_FrSky: clean up GPS satellite count reporting
OSD_FrSky: fix GPS speed (should be in knots), send GPS course as well
OSD_FrSky: fix a few typos in variable names, remove trailing spaces
OSD_FrSky: use floor instead of int cast in sendTwoPart() to make it clear
OSD_FrSky: send gps count in fuel level as well (a'la MultiWii)