Reads and writes Magellan Route (.rte) files.
Header: $PMGNFMT,%RTE,NUM_MSG,ID,FLAG,NUM,NAME,WPT_NAME1,ICON1,WPT_NAME2,ICON2,CHKSUM ?%WPL,LAT,HEMI,LON,HEMI,ALT,UNIT,NAME,MSG,ICON,CHKSUM,%META,ASCII
Format: $PMGNWPL,4809.43440,N,01135.06121,E,0,M,Muenchner-Freiheit,,a*10
$PMGNRTE,3,1,c,1,Muenchen_Route,Muenchner-Freiheit,a,Engl-Garten-1,a*60
@author Christian Pesch