MinorServo system:

    * changed the hexlib MinorServoLibrary in order to match the MSCU parameters 
      ordering (x, y1, y2, z1, z2, z3)
    * added a conversion from degrees to radians (the hexlib takes radians) in 
      virtual2real and from radians to degrees in real2virtual
    * added in virtua2real and real2virtual the zero position of the hexlib 
      (1570 mm of elongation)