Implement parameters subsystem

* Unified parameters storage.
* Store parameters in flash on the hardware.
* Store parameters in text file in simulation.
* Work with parameters in command line.
* Support parameters in MAVLink for working with parameters in QGC.

gazebo/flix.h

@@ -45,6 +45,8 @@ void controlTorque();
 void showTable();
 bool motorsActive();
 void cliTestMotor(uint8_t n);
+String stringToken(char* str, const char* delim);
+void normalizeRC();
 void printRCCal();
 void processMavlink();
 void sendMavlink();
@@ -62,3 +64,4 @@ void calibrateAccel() { printf("Skip accel calibrating\n"); };
 void sendMotors() {};
 void printIMUCal() { printf("cal: N/A\n"); };
 void printIMUInfo() {};
+Vector accBias, gyroBias, accScale(1, 1, 1);