Compatibility problem 1 solved - first build succes

Modification:
car.h merged with 1.3.1:
#define _fuelTotal priv.fuel_consumption_total
#define _fuelInstant priv.fuel_consumption_instant
tdble   fuel_consumption_total; // l
tdble   fuel_consumption_instant; // l/100km (>100 means infinity)
PracticalSocket.cpp added.