Moved to new value format on model.stick. Used to be float 0..1, is not float -100...

Moved to new value format on model.stick. Used to be float 0..1, is not float -100 to 100, plus a series of other fixes:

Updated process_inputs() to the new values
Added dual-rate math to process_inputs()
Updated the ISR_Timer to reflect the new value format, and added an extra sanity check
Added raw values to model datastruct for debugging
Added dumping of raw value to serial-dumping.
Tested tuning of PPM timing const's, may still be glitchy..
Moved the calibrate-trigger during startup, it did not get triggered after the change to active low logic
Removed a for-loop-limit-bug causing incorrect/invalid values for input_cal.max[0] and model.stick[0]
Changed the calibrate routine to use one int less, less code space and cycles.