Graph: Added 'c', 'C' to floats, scan as doubles, more resiliency against funky logs.
Graph: Added 'c', 'C' to floats, scan as doubles, more resiliency
against funky logs.

As recently found out, the 'c' and 'C' codes should also be parsed as
floats.

Also, they should actually be parsed as double's. This allows the
plotting of Latitude and Longitude without losing precision.

Finally, added some more checks and boundaries to reject lines with
parsing errors. This should prevent further anomalies/crashes during
log import.

dcarpy/apm_planner,duststorm/apm_planner,labtoast/apm_planner,mrpilot2/apm_planner,gpaes/apm_planner,gpaes/apm_planner,abcdelf/apm_planner,mirkix/apm_planner,xros/apm_planner,LittleBun/apm_planner,Icenowy/apm_planner,abcdelf/apm_planner,chen0510566/apm_planner,diydrones/apm_planner,mirkix/apm_planner,LIKAIMO/apm_planner,kellyschrock/apm_planner,kellyschrock/apm_planner,sutherlandm/apm_planner,dcarpy/apm_planner,kellyschrock/apm_planner,kellyschrock/apm_planner,dcarpy/apm_planner,kellyschrock/apm_planner,duststorm/apm_planner,mirkix/apm_planner,Icenowy/apm_planner,hejunbok/apm_planner,chen0510566/apm_planner,Icenowy/apm_planner,hejunbok/apm_planner,sutherlandm/apm_planner,WorkerBees/apm_planner,LittleBun/apm_planner,chen0510566/apm_planner,gpaes/apm_planner,duststorm/apm_planner,diydrones/apm_planner,mirkix/apm_planner,diydrones/apm_planner,gpaes/apm_planner,gpaes/apm_planner,gpaes/apm_planner,chen0510566/apm_planner,duststorm/apm_planner,xros/apm_planner,hejunbok/apm_planner,diydrones/apm_planner,LittleBun/apm_planner,sutherlandm/apm_planner,labtoast/apm_planner,duststorm/apm_planner,381426068/apm_planner,381426068/apm_planner,abcdelf/apm_planner,sutherlandm/apm_planner,LIKAIMO/apm_planner,LittleBun/apm_planner,mrpilot2/apm_planner,labtoast/apm_planner,diydrones/apm_planner,abcdelf/apm_planner,LIKAIMO/apm_planner,mrpilot2/apm_planner,xros/apm_planner,WorkerBees/apm_planner,LIKAIMO/apm_planner,labtoast/apm_planner,mrpilot2/apm_planner,chen0510566/apm_planner,hejunbok/apm_planner,labtoast/apm_planner,hejunbok/apm_planner,chen0510566/apm_planner,381426068/apm_planner,Icenowy/apm_planner,LittleBun/apm_planner,WorkerBees/apm_planner,xros/apm_planner,381426068/apm_planner,mirkix/apm_planner,381426068/apm_planner,duststorm/apm_planner,abcdelf/apm_planner,labtoast/apm_planner,mirkix/apm_planner,sutherlandm/apm_planner,Icenowy/apm_planner,LittleBun/apm_planner,WorkerBees/apm_planner,dcarpy/apm_planner,sutherlandm/apm_planner,kellyschrock/apm_planner,LIKAIMO/apm_planner,381426068/apm_planner,mrpilot2/apm_planner,mrpilot2/apm_planner,diydrones/apm_planner,LIKAIMO/apm_planner,xros/apm_planner,hejunbok/apm_planner,xros/apm_planner,dcarpy/apm_planner,abcdelf/apm_planner,Icenowy/apm_planner,dcarpy/apm_planner