Delete old FGClite tests
Add new FGClite script
Update .gitignore to ignore /Debug folder
Clarify comments in plep.h and ramp.h
Update libfg/src/ramp.c to fix potenial bug if config->deceleration is negative
Update libreg/src/meas.c to fix bug in regMeasRateRT()
Update libreg to handle invalid measurements
Update cctest to support testing invalid measurements with libreg