Plane fly modes: FBW_A, LOITER and GUIDED

**Details**
Change mode - FBW_A, LOITER and GUIDED

**Comands**
*Stabilization*
mavgraph.py Loiter_RTL.bin "ATT.DesPitch" "ATT.Pitch" --flightmode=apm
mavgraph.py Loiter_RTL.bin "ATT.DesRoll" "ATT.Roll" --flightmode=apm

*GPS*
mavgraph.py Loiter_RTL.bin "GPS.Lat" "GPS.Lng" --flightmode=apm

*Altitude measurements*
/Users/ahcorde/mavgraph.py $1 "GPS.RelAlt" "GPS.Alt" "BARO.Alt" --flightmode=apm

mavgraph.py Loiter_RTL.bin "GPS.RelAlt" "GPS.Alt"  "BARO.Alt" --flightmode=apm