This class is done to fit an axis throught the calorimeter hit. 
It has to be applied to the x and y view independently. 
The axis fitting routine is optimized for two purpose: to fit non interacting patterns and to fit interacting patterns.


USAGE:


	float toll = 0.8; tolerance around the track

	CaloAxis *cax = new CaloAxis(); 
	cax->FitShower(event->GetCaloLevel1(), 0, toll); // non int.
	cax->FitAxis(event->GetCaloLevel1(), 0, toll);	// int.
    	
	CaloAxis *cay = new CaloAxis(); 
	cay->FitShower(event->GetCaloLevel1(), 1, toll); // non int. 
	cay->FitAxis(event->GetCaloLevel1(), 1, toll);  // non int.