Update of TOF classes to implement speed-of-light calibration option

Update of TOF reconstruction and calibration classes to allow consistent usage of latest calibration scheme

core/data/tof/CbmTofHit.h

@@ -82,6 +82,12 @@ public:
   double GetCosPhi() const { return GetX() / GetRt(); }
   double GetSinPhi() const { return GetY() / GetRt(); }
 
+  inline double Dist3D(CbmTofHit* pHit)
+  {
+    return sqrt((GetX() - pHit->GetX()) * (GetX() - pHit->GetX()) + (GetY() - pHit->GetY()) * (GetY() - pHit->GetY())
+                + (GetZ() - pHit->GetZ()) * (GetZ() - pHit->GetZ()));
+  }
+
   /** Modifiers **/
   void SetFlag(int32_t flag) { fFlag = flag; };